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Bijan Diamonds has an Advanced Loose Diamond Search that allows you to find the perfect diamond by selecting specific search criteria, such as the cut, color, clarity, carat weight, and price of a diamond.
The standard unit of weight used for gemstones. One carat equals .200 grams (or 200 milligrams). Usually abbreviated ct.
Diamonds are weighed to a thousandth (0.001) of a carat and then rounded to the nearest hundredth, or point. Over a carat, diamond weights are usually expressed in carats and decimals. A 1.03 ct. stone in your diamond jewelry, for example, would be described as "one point oh three carats," or "one oh three." A diamond that weighs 0.83 ct. is said to weigh "eighty-three points," or an "eighty-three pointer."
The ROUND diamond is today's most popular diamond shape. All other diamond other than round are referred to as "fancy-shaped" diamonds. Since these shapes are all different, unique characteristics determine quality. Below are some learning tools to help you recognize the best fancy shaped diamond shapes. Personal preference of course is the most determining factor for choosing a shape of your choice for your diamond jewelry
ROUND CUT diamonds consists of 57 facets (58 with a culet) and displays the most fire and scintillation of all the cuts. A property why round shape diamonds are popular for diamond jewelry such as engagement rings and wedding bands.
The PRINCESS CUT diamond is a square cut diamond with 90 degree angles on each corner. It has a tremendous amount of brilliance, second only to rounds. Princess cut diamonds have become increasingly popular within the past few years. The princess cut can vary greatly in how square or rectangular they are. For a square shape, look for a length to width ratio between 1.00 and 1.10. For a rectangle, look for a ratio between 1.50 and 2.00. Table should be between 65-80% and the depth between 65-75%.
EMERALD CUT can be rectangular or square in shape and have beveled corners and step-cut facets. This shape really shows off the clarity of a diamond and can vary in the rectangularity. The length to width ratio will allow you to find the shape you are looking for. For a traditional emerald cut, look for a length to width ratio between 1.30 and 1.40. For a pleasant looking emerald cut diamond, the table should measure between 60-75% and depth between 53-70%.
ASSCHER CUT diamonds, often called the square emerald cut, has cropped corners and was designed in 1902 by the Asscher Brothers of Holland. The length to width ratio should be between 1.00 and 1.05. The table and depth percentage should measure the same as an emerald, between 60 - 75% and 53 - 70% respectively.
An OVAL DIAMOND has stunning brilliance, due in large part to its facets, which are similar to those in a round diamond. The length can accentuate long, slender fingers. It was invented in the early 1960’s. For an eye catching and beautiful oval diamond, the length to width ratio should be between 1.33 and 1.66. In this case, the table should measure between 53 - 62% and depth between 60 - 70%.
The DIAMOND MARQUISE cut is elongated with pointed ends. It was inspired by the smile of the Marquise de Pompadour and created for France's Louis XIV, who wanted a diamond to match it. The length of the marquise can also make fingers appear longer and more slender. When looking for a marquise shaped diamond, the length to width ratio should be between 1.50 and 2.25 and table and depth percentages between 53 - 60% and 50 - 65% respectively.
The PEAR SHAPED diamond is a combination of oval and marquise cuts. The sparkling teardrop has good proportions and refracts the light well. This Pear Shaped Diamond looks best set as a pendant or pair of pear diamond earrings. For a pear shape, the length to width ratio should be between 1.40 and 1.75. The table percentage should measure 53 - 60% and depth percentage 50 - 65%.
The RADIANT CUT diamond is cut in the shape of a rectangle with rounded corners. Radiant cut diamonds facets are cut into a pattern that gives this diamond the unique appearance of cracked ice. Radiant cut diamonds can vary in their degree of rectangularity. For a square radiant, look for a length to width ratio between 1.00 and 1.10. For a rectangular radiant, the length to width ratio should be between 1.50 and 2.00. Regardless of how rectangular the radiant is, the table should be between 65 - 80% and depth between 65 - 75%.
The HEART SHAPED diamond may be hard to find, but it is considered the most sentimental of all the diamond shapes. It is important to find a heart diamond with even lobes and a well-defined outline. Because its shape is very close to that of a round, it has beautiful brilliance. The length to width ratio for a well-proportioned heart-shaped diamond is between 0.90 - 1.10. The depth of a heart-shaped diamond should be between 50 - 63% and the table between 53 - 65%.
The CUSHION CUT diamond is an antique cut and is also referred to as Pillow cut or the Candlelight diamond. Cushion cut diamonds have larger facets and rounded corners than most cuts so as to increase their sparkle under candlelight.
The TRIANGLE DIAMOND, first designed in Amsterdam, is cut into the shape of a wedge. The corners of the triangle cut diamonds may be pointed or rounded and the body will vary depending on the stone’s characteristics and the cutter’s preference.
Refers to the degree to which a diamond is colorless. Diamond color has a significant impact on its value. The color scale ranges from D to Z, from colorless to light yellow. Warmer colored diamonds (K-Z) are particularly desirable when set in yellow gold. Icy winter whites (D-G) look stunning set in white gold or platinum.
Color Grade Diagram
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Color Grade |
Description |
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D |
This is the highest Color Grade and absolutely colorless. Price is high due to its rarity but hey, if you can afford it, go ahead... |
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E |
It is colorless to the unaided eye. Only a trained gemologist using special equipment can determine any color difference between a D- and an E-color diamond. This is considered a rare diamond. |
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F |
Colorless, a slight color detected by an expert gemologist, but still considered a Colorless grade and a high-quality diamond. This will work with any white gold or platinum. |
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G |
This diamond is nearly colorless with an extremely faint tint that is noticeable only to a trained gemologist. G-color diamonds are ideal for beautiful jewelry because they offer an outstanding value at a lesser price compared to the colorless grades, but it still appears to be colorless when mounted. |
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H |
This has an advantage of exceptional value due to the near colorless range. This diamond will appear colorless when mounted on a very slight tint of color. |
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I |
Near-colorless with a slightly detectable tint and is an excellent value. |
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J |
J, J, J... what can i say. Might look better when viewed in the day. Or even better if you may... less to pay to go for a K. |
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K |
This grade begins to show a tint of color when they are of half carat or more. If mounted in white color metals, they may appear as a J-grade. |
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L |
Diamonds graded L show visibly more marked color, and are classified as faintly tinted or colored. |
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M |
Slightly tinted, the line between an L- and M-grade diamond is so thin. |
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N - Z |
Color noticeable by the naked eye. |
Fancy Color Grade Diagram
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Color Grade |
Description |
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FLY |
Fancy light yellow. |
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FY |
Fancy Yellow. This color range has yellow hue but less saturated. These stones are very beautiful but less expensive than intense and vivid range. |
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FI |
Fancy Intense. Intensity color range for diamonds have richer color and quality. Values of this kind of diamond are higher. |
|
FYV |
Fancy Yellow Vivid. Vivid yellow diamonds are the rarest and most unique diamonds. These characteristics make it the most expensive kind from any other range. |
Grading Natural Fancy Yellow Color Diamond
Diagram of Fancy Yellow Colored Diamonds (Canary)
Range from Vivid to Light
Diagram of Non-fancy Diamond
Range from Z - U
Most diamonds used as gemstones are basically transparent with little tint, or white diamonds. The most common impurity, nitrogen, replaces a small proportion of carbon atoms in a diamond's structure and causes a yellowish to brownish tint.
Beautiful yellow diamonds exist in tones from light yellow to fancy intense vivid yellow, also named Canary Yellow, depending on the concentration of nitrogen when the crystal is formed. Yellow diamonds are more desirable than white diamonds, due to their warm color. In fancy diamonds, inclusions are mostly not noticeable to the naked eye because of its rich color, inclusions does not affect the look or its sparkles not like in clear diamonds.
Natural fancy coloured diamonds are very rare and expensive. Most people believe that yellow diamonds are less desirable and valuable than white diamonds. While this is true of faintly coloured or off-white diamonds, intensely coloured diamonds are very attractive, rare and expensive. The Kimberley Octahedron is the largest diamond in the world at about 616 carats, and is yellow.
Grading fancy color diamonds
Yellow or brown color diamonds having color more intense than "Z", as well as diamonds exhibiting color other than yellow or brown are considered fancy colored diamonds. These diamonds are graded using separate systems which indicate the characteristics of the color, and not just its presence. These color grading systems are similar to those used for other colored gemstones, such as ruby, sapphire, or emerald, than they are to the system used for white diamonds.
GIA colored diamond grading system
The GIA issues grading a Colored Diamond Grading Report for colors that are not in the normal color range of diamonds. Formal GIA terms used to describe natural yellow diamonds:
Fancy Vivid Yellow- Vivid yellow diamonds are the rarest and most unique diamonds. These characteristics make it the most expensive kind from any other range. This range has the richest and most intense hue of all.
Fancy Intense Yellow- Intensity color range for diamonds have richer color and quality. Values of this kind of diamond are higher.
Fancy Yellow- This color range has yellow hue but less saturated. These stones are very beautiful but less expensive than intense and vivid range.
Light Fancy Yellow- There is slight yellow tint that can be detected by human eye on this color range. The buyer perception of color for yellow diamonds is confident, intelligent and wordly. Lighter shades are a great value because they still look yellow, yet you can have more size for the money.
Gran Colorimeter
Color can also be determined using a device called the Gran Colorimeter, manufactured by Sarin Technologies. It measures from D to Z to Fancy Intense with an accuracy within ±½ of a color grade on loose stones from 0.25 to 10 carats (as low as .15 carat or as high as 20 carats with reduced accuracy), and you can specify which grading scale it should use (GIA, GEM, IGI, AGS, HRD, and others). The accuracy is within ±1 color grade for mounted stones. If you diamond is a "G" color it will tell you whether it's a "high G" or a "low G". The Gran colorimeter was first developed by Paul Gran in 1972 at Gran Computer Industries Ltd.
A Diamond is the hardest natural material known to man and the third-hardest known material after aggregated diamond nanorods and ultrahard fullerite. Its hardness and high dispersion of light make it useful for industrial applications and jewelry.
Diamonds are specifically renowned as a material with superlative physical qualities, they make excellent abrasives because they can be scratched only by other diamonds, Borazon, ultrahard fullerite, or aggregated diamond nanorods, which also means they hold a polish extremely well and retain their lustre. About 130 million carats (26,000 kg) are mined annually, with a total value of nearly USD $9 billion. About 100,000 kg are synthesized annually.
The name diamond derives from the ancient Greek adamas (αδ?μας "invincible"). They have been treasured as gemstones since their use as religious icons in ancient India and usage in engraving tools also dates to early human history. Popularity of diamonds has risen since the 19th century because of increased supply, improved cutting and polishing techniques, growth in the world economy, and innovative and successful advertising campaigns. They are commonly judged by the "Four C’s": carat, clarity, color, and cut.
Roughly 49% of diamonds originate from central and southern Africa, although significant sources of the mineral have been discovered in Canada, India, Russia, Brazil, and Australia. They are mined from kimberlite and lamproite volcanic pipes, which brought to the surface the diamond crystals from deep in the Earth where the high pressure and temperature enables the formation of the crystals. The mining and distribution of natural diamonds are subjects of frequent controversy such as with concerns over the sale of conflict diamonds by African paramilitary groups. There are also allegations that the De Beers Group misuses its dominance in the industry to control supply and manipulate price via monopolistic practices, although in recent years the company's market share has dropped to below 50%.
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Independent Gemological Laboratories
A diamond grading certificate is a report given by an independent and professional gemological laboratory. The diamond is evaluated for its quality, not its value. Every diamond is unique. The certificate will map out all the diamond's recognizable and individual characteristics. Each certificate will include the diamond's color, clarity, carat weight and cut information (see the 4 C's). The grading report also includes a hand-drawn map of the diamond's inclusions. Since no two diamonds are exactly alike you can always check that the certificate matches the diamond. When it comes to certification and appraisal, you need absolute accuracy, precision and reliability. That is why our stones are appraised by two of the most respected laboratories in the Trade. | |
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| GEMOLOGICAL INSTITUTE OF AMERICA (GIA) | |
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An independent nonprofit organization, the Gemological Institute of America (GIA) is renowned for its impartial service as the world's foremost authority in gemology. The Institute's history of ground-breaking scientific research, education, and gemological laboratory services reads as a virtual chronicle of the industry's own growth and sophistication.
From 1953, when Richard T. Liddicoat created and introduced the International Diamond Grading System™ - to the position the Institute holds today as the most respected grading and identification authority in the world - GIA has combined the principles of research, education, and service to help gem and jewelry professionals around the globe use science and product knowledge to sustain the public's trust. The GIA can be reached at: World Headquarters The Robert Mouawad Campus 5345 Armada Drive Carlsbad, California 92008 Telephone: (800) 421-7250 or (760) 603-4000 E-mail: ghill@gia.edu | |
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| EUROPEAN GEMOLOGICAL LABORATORY (EGL) USA | |
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EGL USA is one of the largest and oldest independent gemological institutions focusing on gemstone certification and research. Originally part of an international network founded in Europe in 1974, EGL USA opened its first U.S. lab in the heart of New York's international diamond and jewelry district in 1977. In 1986 EGL USA became independently owned. Today the EGL USA Group has laboratories in New York City, Los Angeles, Vancouver, and Toronto.
EGL USA is not affiliated with any other EGL labs outside North America. Every certificate issued by our lab states "A member of the EGL USA Group." Certificate numbers are preceded by either "US" or "CA," to indicate country of origin and to provide consumers the assurance that their certificate has been issued by a member of the EGL USA Group. In 1999 EGL USA initiated a Research Department to respond to the changing needs of the jewelry industry. It is one of only a few labs worldwide doing advanced research in gemology. The EGL can be reached at: 6 West 48th Street New York, NY 10036 Telephone: 212-730-7380 Fax: 212-842-5180 E-mail: egl@eglusa.com And @ EGL USA/Los Angeles 550 South Hill Suite 840 Los Angeles, CA 90013 Telephone: 877-893-8593 Fax: 213-534-2224 |
The GIA Cut Scale ranges from Excellent to Poor and they provide a cut quality grade for standard round brilliant diamonds that fall in the D-to-Z color range. A polished diamond's beauty lies in its complex relationship with light:
The result of the complex relationship with light is a magnificent display of three attributes. Brightness is the combination of all white light reflecting from the surface and interior of a diamond. Fire describes the "flares" of color emitted from a diamond. Scintillation describes the flashes of light you see when the diamond, the light or when the observer moves.
A polished diamond's proportions affect its light performance, which in turn affects its beauty and overall appeal. Diamonds with fine proportions, symmetry and polish optimize their interaction with light, and have increased brightness, fire and scintillation.
Learn about Hearts and Arrows
Bijan Diamonds Ideal Princess Cut
Each Bijan Diamonds Ideal Princess Cut diamond has exact proportions, and is certified to have a length-to-width ratio no greater than 1.05. The Bijan Diamonds Ideal Princess Cut diamond features a longer crown height that is almost twice the normal height that the industry is producing. The light can be absorbed more if the crown is higher, while the exquisite polish and symmetry enable the facets to display maximum brilliance. With its smaller table and precise symmetry, the Bijan Diamonds Ideal Princess Cut diamond is able to return more light. Each diamond is engineered to maximize quality over size. While typical diamonds are cut to a depth of 88% or more, Bijan Diamonds Ideal Cut diamonds are cut to a depth of 70% or less, giving up approximately 7% carat weight to ensure higher quality.
Bijan Diamonds Ideal Emerald Cut
The major difference between the Bijan Diamonds Ideal Emerald Cut diamond and the standard emerald cut in the industry are the culet and higher crown. Also, Bijan Diamonds Ideal Emerald Cut diamond has outstanding proportions, symmetry, polish, maximum brilliance and ability to stop light from escaping. The brilliance is achieved by bigger crown facets which absorb more light, while the distribution of pavilion facets reflects more light. In addition, all Bijan Diamonds Ideal Emerald Cut diamonds have a guaranteed clarity of VS2 or better, so you can be assured that stones will be eye-clean.
Bijan Diamonds Ideal Asscher Cut
Only the finest chosen raw diamonds are cut to produce Bijan Diamonds Ideal Asscher Cut diamond to make sure of the precise proportions to get absolutely perfect length-to-width ratios. One of the major differences of Bijan Diamonds Ideal Asscher Cut diamond and the standard emerald cut in the industry is its wider corners. This perfect angle can capture more light from this eight corner as it reflect square pattern that product more brightness and sparkles. Also you will notice that the crown is about 10% higher than the standard diamond. It makes the table smaller and larger facets on the crown that capture and return more light. Another difference is having a cullet. "
Hearts and Arrows on Bijan Diamonds Ideal Round Cut
The term Hearts and Arrows is used to describe the figure that can be seen on the bottom and top of a round diamond with perfect symmetry and angles. The Hearts and Arrows effect is exist in all of Bijan Diamonds Ideal Round Cut Collection diamonds. When viewed under special magnification, the perfectly aligned facets of the Bijan Diamonds Ideal Round Cut diamond reveal the Hearts and Arrows pattern. From the bottom, eight absolute symmetrical hearts can be seen and, when viewed from the top, eight thoroughly uniform arrows can be seen. This shows how perfect and uniform each facet of a diamond which will have the maximum brilliance.
The dimensions of the diamond listed as "minimum diameter - maximum diameter x depth" for round diamonds and "length x width x depth" for fancy shaped diamonds. (ex: 6.46 - 6.16 x 4.46)
Determine Your Budget |
| When a guy’s shopping for an engagement ring, sales people often do a sneaky thing - they make him think that the amount of his love is tied to how much he spends on a ring. Better to figure out how much you can afford to spend before you step foot in a store. The standard rule is two months salary but this is also a rule that the diamond industry created! However it is still a decent place to start, but then figure out your personal budget. |
| Clarity Grade |
Description |
| FL |
Flawless. Shows no inclusions or blemishes of any sort under 10X magnification when observed by an experienced grader. No internal flaws. Very rare and very expensive. |
| IF |
Internally Flawless. Has no internal inclusions when examined by an experienced grader using 10X magnification, but will have some minor blemishes. Also very rare and very expensive. |
| VVS1 |
Very, Very Slightly Included. This contains minute inclusions that are difficult to see under 10X magnification even for experienced graders. |
| VVS2 |
Very, Very Slightly Included. Contains minute inclusions that are difficult even for experienced graders to under 10X magnification. More inclusions compared to VVS1. |
| VS1 |
Slightly Included. Contains inclusions (clouds, included crystals, knots, cavities and feathers) that are noticeable to an experienced grader under 10X magnification. Might be visible to the naked eye. Lesser inclusions as compared to VS2 and this grade is considered of good quality. |
| VS2 |
Very Slightly Included. Contains minute inclusions such as small crystals, clouds or feathers when observed with effort under 10X magnification. More inclusions as compared to VS1 but less compared to SI1. Inclusions are not visible to the unaided eye and is considered high quality. |
| SI1 |
Slightly Included. Contains inclusions (clouds, included crystals, knots, cavities and feathers) that are noticeable to an experienced grader under 10X magnification. Might be visible to the naked eye. Lesser inclusions as compared to SI2 and this grade is considered of good quality. |
| SI2 |
Slightly Included. Contains inclusions (clouds, included crystals, knots, cavities and feathers) that are noticeable to an experienced grader under 10X magnification and might be visible to the naked eye. Lesser inclusions as compared to SI3. A good diamond value. |
| SI3 |
Slightly Included. Contains inclusions (clouds, included crystals, knots, cavities and feathers) that are noticeable to an experienced grader under 10X magnification. Might be visible to the naked eye. Lesser inclusions as compared to I1. A good diamond value. |
| I1 |
Contains inclusions (possible large feathers or large included crystals) that are obvious under 10X magnification and may affect transparency and brilliance. Inclusions are visible to the naked eye. |
| I2 |
Large and/or numerous internal defects which are very easily discernible by the experienced expert with the naked eye and which diminished brilliance. |
| I3 |
Large and/or numerous internal defects which are easily discernible by the experienced expert with the naked eye and which slightly diminished brilliance. |
Natural Fancy Yellow Color Diamond
Diagram of Fancy Colored Diamonds(Canary)
Range from Vivid to Light
Diagram of Non-fancy Diamond
Range from Z - U
Most diamonds used as gemstones are basically transparent with little tint, or white diamonds. The most common impurity, nitrogen, replaces a small proportion of carbon atoms in a diamond's structure and causes a yellowish to brownish tint.
Beautiful yellow diamonds exist in tones from light yellow to fancy intense vivid yellow, also named Canary Yellow, depending on the concentration of nitrogen when the crystal is formed. Yellow diamonds are more desirable than white diamonds, due to their warm color. In fancy diamonds, inclusions are mostly not noticeable to the naked eye because of its rich color, inclusions does not affect the look or its sparkles not like in clear diamonds.
Natural fancy coloured diamonds are very rare and expensive. Most people believe that yellow diamonds are less desirable and valuable than white diamonds. While this is true of faintly coloured or off-white diamonds, intensely coloured diamonds are very attractive, rare and expensive. The Kimberley Octahedron is the largest diamond in the world at about 616 carats, and is yellow.
Grading fancy color diamonds
Yellow or brown color diamonds having color more intense than "Z", as well as diamonds exhibiting color other than yellow or brown are considered fancy colored diamonds. These diamonds are graded using separate systems which indicate the characteristics of the color, and not just its presence. These color grading systems are similar to those used for other colored gemstones, such as ruby, sapphire, or emerald, than they are to the system used for white diamonds.
GIA colored diamond grading system
The GIA issues grading a Colored Diamond Grading Report for colors that are not in the normal color range of diamonds. Formal GIA terms used to describe natural yellow diamonds:
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Gran Colorimeter |
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Color can also be determined using a device called the Gran Colorimeter, manufactured by Sarin Technologies. It measures from D to Z to Fancy Intense with an accuracy within ±½ of a color grade on loose stones from 0.25 to 10 carats (as low as .15 carat or as high as 20 carats with reduced accuracy), and you can specify which grading scale it should use (GIA, GEM, IGI, AGS, HRD, and others). The accuracy is within ±1 color grade for mounted stones. If you diamond is a "G" color it will tell you whether it's a "high G" or a "low G." The Gran colorimeter was first developed by Paul Gran in 1972 at Gran Computer Industries Ltd. |
Natural Fancy Yellow Color Diamond
Diagram of Fancy Colored Diamonds(Canary)
Range from Vivid to Light
Diagram of Non-fancy Diamond
Range from Z - U
Most diamonds used as gemstones are basically transparent with little tint, or white diamonds. The most common impurity, nitrogen, replaces a small proportion of carbon atoms in a diamond's structure and causes a yellowish to brownish tint.
Beautiful yellow diamonds exist in tones from light yellow to fancy intense vivid yellow, also named Canary Yellow, depending on the concentration of nitrogen when the crystal is formed. Yellow diamonds are more desirable than white diamonds, due to their warm color. In fancy diamonds, inclusions are mostly not noticeable to the naked eye because of its rich color, inclusions does not affect the look or its sparkles not like in clear diamonds.
Natural fancy coloured diamonds are very rare and expensive. Most people believe that yellow diamonds are less desirable and valuable than white diamonds. While this is true of faintly coloured or off-white diamonds, intensely coloured diamonds are very attractive, rare and expensive. The Kimberley Octahedron is the largest diamond in the world at about 616 carats, and is yellow.
Grading fancy color diamonds
Yellow or brown color diamonds having color more intense than "Z", as well as diamonds exhibiting color other than yellow or brown are considered fancy colored diamonds. These diamonds are graded using separate systems which indicate the characteristics of the color, and not just its presence. These color grading systems are similar to those used for other colored gemstones, such as ruby, sapphire, or emerald, than they are to the system used for white diamonds.
GIA colored diamond grading system
The GIA issues grading a Colored Diamond Grading Report for colors that are not in the normal color range of diamonds. Formal GIA terms used to describe natural yellow diamonds:
|
Gran Colorimeter |
|
Color can also be determined using a device called the Gran Colorimeter, manufactured by Sarin Technologies. It measures from D to Z to Fancy Intense with an accuracy within ±½ of a color grade on loose stones from 0.25 to 10 carats (as low as .15 carat or as high as 20 carats with reduced accuracy), and you can specify which grading scale it should use (GIA, GEM, IGI, AGS, HRD, and others). The accuracy is within ±1 color grade for mounted stones. If you diamond is a "G" color it will tell you whether it's a "high G" or a "low G." The Gran colorimeter was first developed by Paul Gran in 1972 at Gran Computer Industries Ltd. |
NOTE:Shipment charges (both ways) apply to any returned goods.Automatic $25 will be deducted from your original refunded amount.
To return a diamond or jewelry item to Diamond on Net, follow our three step process:
1. Your Return Authorization Code
Call 800-516-1412 and you will be given a Return Authorization Code. Write this code on the return sticker found at the bottom of your original invoice. Affix the sticker to the outside of the box you are returning.
2. Package Your Return
Include all original packaging and collateral material. If your item was delivered with a diamond certificate and that certificate is not returned, you may be liable for the $250 replacement cost. For security reasons, do not write Diamond on Net anywhere on the outside of the box.
3. Insure Your Package
Please ship your return package back to BijanDiamonds.com via United States Postal Service. We recommend that you use the following U.S.P.S. services:
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Insurance
with Registered Mail Registered Mail is the most secure service that the U.S.P.S. offers. Items you send are placed under tight security from the point of mailing to the point of delivery. To protect against loss or damage, postal insurance is provided for articles with a maximum declared value up to $25,000. To ship via U.S.P.S. Registered Mail, you must bring the package to your local post office, station, or branch. A postmaster may require that an article of unusually high value be presented only at the main office or at designated stations and branches Visit the U.S.P.S. website for more details including Registered Mail fees. Return ReceiptWe recommend you use Return Receipt along with Registered Mail. With Return Receipt service, you get a postcard sent to you, signed by the person who received your package. A return receipt must be purchased at the time of mailing. The fee for this service is $1.75. Consult your local post office for additional details. For more information on U.S.P.S. services, contact them at 1-800-ASK-USPS (1-800-275-8777) or visit their web site at www.usps.com. |
On your invoice, if the price of the item you're returning is listed as:
You must follow these instructions exactly, failure to do so will prevent the processing of your return. If you have any questions about our return procedure, please contact us at Sales@BijanDiamonds.com.
Upon receiving your return, the item will be reviewed a third party gemologist. Once the returned item is reviewed and accepted, your refund or new item will be processed in just a few days Please note that items showing signs of wear or those that have been engraved, altered, resized (by a jeweler other than Diamond on Net), or damaged in any way cannot be accepted for return. Returns with no Diamond on Net return code, and packages that are improperly packaged or uninsured will be refused receipt.
The width is the horizontal measurement of piece of jewelry. Any band or ring is measured across the widest area on the top. Settings are measured across the widest metal part, closest to where the center diamond is set. All measurements are approximate and refer to the widest part of the piece.
Grading Natural Fancy Yellow Color Diamond
Diagram of Fancy Colored Diamonds(Canary)
Range from Vivid to Light
Diagram of Non-fancy Diamond
Range from Z - U
Most diamonds used as gemstones are basically transparent with little tint, or white diamonds. The most common impurity, nitrogen, replaces a small proportion of carbon atoms in a diamond's structure and causes a yellowish to brownish tint.
Beautiful yellow diamonds exist in tones from light yellow to fancy intense vivid yellow, also named Canary Yellow, depending on the concentration of nitrogen when the crystal is formed. Yellow diamonds are more desirable than white diamonds, due to their warm color. In fancy diamonds, inclusions are mostly not noticeable to the naked eye because of its rich color, inclusions does not affect the look or its sparkles not like in clear diamonds.
Natural fancy coloured diamonds are very rare and expensive. Most people believe that yellow diamonds are less desirable and valuable than white diamonds. While this is true of faintly coloured or off-white diamonds, intensely coloured diamonds are very attractive, rare and expensive. The Kimberley Octahedron is the largest diamond in the world at about 616 carats, and is yellow.
Grading fancy color diamonds
Yellow or brown color diamonds having color more intense than "Z", as well as diamonds exhibiting color other than yellow or brown are considered fancy colored diamonds. These diamonds are graded using separate systems which indicate the characteristics of the color, and not just its presence. These color grading systems are similar to those used for other colored gemstones, such as ruby, sapphire, or emerald, than they are to the system used for white diamonds.
GIA colored diamond grading system
The GIA issues grading a Colored Diamond Grading Report for colors that are not in the normal color range of diamonds. Formal GIA terms used to describe natural yellow diamonds:
Fancy Vivid Yellow- Vivid yellow diamonds are the rarest and most unique diamonds. These characteristics make it the most expensive kind from any other range. This range has the richest and most intense hue of all.
Fancy Intense Yellow- Intensity color range for diamonds have richer color and quality. Values of this kind of diamond are higher.
Fancy Yellow- This color range has yellow hue but less saturated. These stones are very beautiful but less expensive than intense and vivid range.
Light Fancy Yellow- There is slight yellow tint that can be detected by human eye on this color range. The buyer perception of color for yellow diamonds is confident, intelligent and wordly. Lighter shades are a great value because they still look yellow, yet you can have more size for the money.
Gran Colorimeter
Color can also be determined using a device called the Gran Colorimeter, manufactured by Sarin Technologies. It measures from D to Z to Fancy Intense with an accuracy within ±½ of a color grade on loose stones from 0.25 to 10 carats (as low as .15 carat or as high as 20 carats with reduced accuracy), and you can specify which grading scale it should use (GIA, GEM, IGI, AGS, HRD, and others). The accuracy is within ±1 color grade for mounted stones. If you diamond is a "G" color it will tell you whether it's a "high G" or a "low G." The Gran colorimeter was first developed by Paul Gran in 1972 at Gran Computer Industries Ltd.
| AU | - 75 USD + 10.0% (approx.) |
| CA | - 75 USD + 6--8% (approx.) |
| FR | - 75 USD + 19.6% (approx.) |
| GR | - 75 USD + 19.0% (approx.) |
| IT | - 75 USD + 20.0% (approx.) |
| SP | - 75 USD + 16.0% (approx.) |
| SZ | - 75 USD + 07.6% (approx.) |
| UK | - 75 USD + 17.5% (approx.) |
Friction Post
A device for preventing loss of a pierced earring from an ear lobe is provided and consists of a holder member which will cling to friction post behind the ear lobe. When the friction nut is removed from the earring the holder member will continue to keep the earring in place thereto.
Screw Back
This setting is used for numerous diamonds set together in a tight cluster or group, with minimal metal showing. Giving the impression that the piece of jewelry is entirely paved with stones.
The settings are either created by use of tiny prongs that hold the jewels on both sides, or are crafted by scooping beads of precious metal out to hold the diamonds in place.
EGL USA versus EGL International or EGL Israel
EGL USA is not affiliated with other EGL labs (Example: EGL, EGL International, EGL Israel, EGL Belgium, EGL Turkey, etc...) outside of North America.
There are other labs outside of North America which are using same name such as EGL Israel or EGL International (or even some websites call them only EGL) are not part of EGL USA.
Unfortunately EGL USA is in a legal dispute with EGL International or EGL Israel which has been flooding the market with diamonds that have not been graded as stringently. When purchasing an EGL graded stone, be sure to insist upon EGL-USA only unless you and your jeweler are able to scrutinize the stone in question very well and be assured it is as advertised. Any EGL that does not have an EGLUSA logo can sometimes have a 2 or even 3 grades lower in the color and clarity grades. EGL USA is far stricter compared to other EGL locations. Please visit www.EGLUSA.com for more information or call EGL USA at (877) 893-8593.
Each consultation of appraisal issued by the EGL USA lab states "A member of the EGL USA Group" and certificate numbers are preceded by either "CA" (Canada) or "US" (United States), to provide consumers the assurance that their certificate has been issued by a member of the EGL USA Group.
See a sample of an EGL USA Certificate below
See a sample of an EGL International / Israel Certificate below
Diamond Shapes and Ratio
Shape
The external surface or outline figure of a specific diamond is called the shape of that diamond. Following are the shapes or figures of diamonds: Round, Princess, Asscher, Emerald, Cushion, Radiant, Heart, Marquise, Pear, Oval and Triangle.
Ratio
The proportional relation between length and width of a diamond is called the ratio of that diamond.
Example: Princess cut Diamond
Measurement: 6.25 - 6.05 x 3.77 mm
Measurement: Length - Width x Depth
Length-to-width ratio: Length / Width
= 6.25 / 6.05
= 1.03 (This will look perfectly square to the eye)
Following ratio shows the most appealing for that shape however, personal preference prevails, and some may prefer a shorter, wider outline; or longer, thinner shape.
ROUND CUT Diamond is the most preferred diamond shape as it is most classic and most sparkly shape. The round-brilliant cut is the most visually brilliant because of its 360-degree symmetrical shape and has the most facet count (57 facets: 58 with a culet) than other shapes, therefore it reflects most of the lights that goes in from more angles. Round-brilliant diamonds are the only shape to have this ideal proportion defined. Stone in this highest cut grade exhibit a perfect "Hearts & Arrows" pattern. With other diamond shapes, having lower color grade and clarity usually means giving up some of the beauty of the stone. Because a round-cut diamond gives out higher levels of brilliance and fire, it will offer much of the same pleasant appeal even if it has a lower color, clarity, or cut.
Length-to-width ratio of Round cut Diamond determines how a diamond will look like when viewed from above. For round shaped diamond, look for a length-to-width ratio between 1 and 1.02.
PRINCESS CUT Diamond is the second most popular shape next to round. This cut is the best option to have a square shape diamond but still having the same brilliance as round shape. To protect the 90 degree pointed corners of princess cut diamonds, V-shaped prong is used as its setting. In choosing Princess cut diamonds, you have to consider how square or rectangular the stone to ensure the outline of the stone when it is set on a setting. Some are perfect 1.00 or 1.10 ratio (length to width). For rectangular shape the ratio would be 1.50 to 2.00. In terms of value, the square is more expensive than rectangular princess cut.
Length-to-width ratio of Princess Diamond determines how a diamond will look like when viewed from above. For round shaped diamond, look for a length-to-width ratio between 1 and 1.1. Table should be between 65-80% and the depth between 65-75%.
EMERALD CUT Diamond can be rectangular or square in shape and have beveled corners and step-cut facets. This shape really shows off the clarity of a diamond and can vary in the rectangularity. The length to width ratio will allow you to find the shape you are looking for.
For a traditional Emerald cut, look for a length to width ratio between 1.30 and 1.60. For a pleasant looking emerald cut diamond, the table should measure between 60-75% and depth between 53-70%.
ASSCHER CUT Diamond often called the square emerald cut, has cropped corners and was designed in 1902 by the Asscher Brothers of Holland.
The length to width ratio should be between 1.0 and 1.1. The table and depth percentage should measure the same as an emerald, between 60 - 75% and 53 - 70% respectively.
OVAL CUT Diamond has stunning brilliance, due in large part to its facets, which are similar to those in a round diamond. The length can accentuate long, slender fingers. It was invented in the early 1960’s.
For an eye catching and beautiful oval diamond, the length to width ratio should be between 1.4 and 1.6. In this case, the table should measure between 53 - 62% and depth between 60 - 70%.
MARQUISE CUT Diamond is elongated with pointed ends. It was inspired by the smile of the Marquise de Pompadour and created for France’s Louis XIV, who wanted a diamond to match it. The length of the marquise can also make fingers appear longer and more slender.
When looking for a marquise shaped diamond, the length to width ratio should be between 1.6 and 2.25 and table and depth percentages between 53 -60% and 50 - 65% respectively.
PEAR CUT Diamond is a combination of oval and marquise cuts. The sparkling teardrop has good proportions and refracts the light well. This Pear Shaped Diamond looks best set as a pendant or pair of pear diamond earrings.
For a pear shape, the length to width ratio should be between 1.40 and 1.75. The table percentage should measure 53 - 60% and depth percentage 50 - 65%.
RADIANT CUT Diamond is cut in the shape of a rectangle with beveled corners. Radiant cut diamonds facets are cut into a pattern that gives this diamond the unique appearance of cracked ice. Radiant cut diamonds can vary in their degree of rectangularity.
For a square radiant, look for a length to width ratio between 1.00 and 1.10. For a rectangular radiant, the length to width ratio should be between 1.50 and 2.00. Regardless of how rectangular the radiant is, the table should be between 65 - 80% and depth between 65 - 75%.
HEART CUT Diamond may be hard to find, but it is considered the most sentimental of all the diamond shapes. It is important to find a heart diamond with even lobes and a well-defined outline. Because its shape is very close to that of a round, it has beautiful brilliance.
The length to width ratio for a well-proportioned heart-shaped diamond is between 0.90 - 1.10. The depth of a heart-shaped diamond should be between 50 - 63% and the table between 53 - 65%.
CUSHION CUT Diamond is an antique cut and is also referred to as Pillow cut or the Candlelight diamond. Cushion cut diamonds have larger facets and rounded corners than most cuts so as to increase their sparkle under candlelight.
For a cushion shape, the length to width ratio should be between 1.0 and 1.3.Table should be between 65-80% and the depth between 65-75%.
The TRIANGLE DIAMOND, first designed in Amsterdam, is cut into the shape of a wedge. The corners of the triangle cut diamonds may be pointed or rounded and the body will vary depending on the stone’s characteristics and the cutter’s preference.
Top portion of the diamond, the measurement from the Girdle (center of the diamond) to the Table (top of the diamond).
| Carat Weight: |
| The weight of a diamonds is generally given in carats. Carat (ct.) is the standard unit of weight used for gemstones. 1.00 carat is equal to 0.20 grams or 200 milligrams. Diamonds are weighed to a thousandth (0.001) of a carat and then rounded to the nearest hundredth, which is called point. Over a carat, diamond weights are usually expressed in carats and decimals. A 1.05 ct. stone, for example, would be described as "one point oh five carats" or "one oh five." A diamond that weighs 0.73 ct. is said to weigh "seventy-three points," or an "seventy-three pointer." |