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Green Diamonds – Basics
The color in rare natural green diamonds comes from the displacement of carbon atoms from their normal positions due to radiation in the earth where they formed. Only 1 carat out of every 10,000 carats mined is a natural fancy colored diamond, making rarer colors with high saturation extremely valuable.
PriceScope Pointer: When it comes to fancy colored diamond (FCD) cutting you can throw away the normal cut-quality rules for D-Z colors. The goal with FCDs is cutting with angles which exaggerate the color present – which is opposite the goal for well-cut D-Z diamonds.
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Green diamonds are among the rarest of all fancy colors. The most famous and largest natural green diamond is the 41-carat Dresden Green. The photo (below) shows the diamond set in a hat ornament that was created in 1768. The Dresden Green is an exceptional diamond because its green color is evenly distributed throughout the body of the stone. While most green diamonds owe their color to surface “skins,” the Dresden is uniformly green.
The Dresden Green Diamond
The 41-carat Dresden Green is the largest known green diamond in the world.
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Cause of Color: Cause of color in green diamonds is natural radiation, which creates an external skin or surface of green color. It is uncommon for the green color to reach deep within a diamond. Lab graders assess the natural color of green diamonds by this skin. Irradiated green diamonds are often found in the marketplace, so determining natural color for value is key. Also, note that sometimes labs are unable to conclusively determine the natural origin of green diamonds because the cause is radiation. So it is not unusual for a manufacturer to submit a rough diamond or partially polished diamond so that the lab can identify the natural cause of color prior to completion of polishing.
Secondary Colors: Green is the color between blue and yellow, so common secondary colors in green diamonds include bluish green and yellowish green, and if the color is desaturated, grayish green or brownish green.
Rarity: Natural green diamonds are second to red diamonds as the world’s rarest fancy color. True greens devoid of secondary hue are the most valuable among natural green diamonds.
Grading: Green diamonds are graded as Faint Green, Very Light Green, Light Green, Fancy Light Green, Fancy Green, Fancy Intense Green, Fancy Dark Green, Fancy Deep Green, and Fancy Vivid Green.
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Posted by kenny
0.26-Carat Fancy Intense Green Diamond
Posted by platinumrock
3.17-Carat Greyish-Yellowish Green Diamond
.09-Carat Fancy Intense Bluish Green Diamond
Photo Courtesy of Diamonds by Lauren
Have more questions about fancy color diamonds? Click on the links below or visit our Fancy Colored Diamond Guide.
Fancy Colored Diamond Guide Topics:
Fancy Colored Diamond Introduction,
Featured photo credit: Gemological Institute of America (GIA)
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