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My Store Jewelers Service Offering J. Thomas Jewelers Rochester Hills, MI My Store Jewelers Service Offering J. Thomas Jewelers Rochester Hills, MI

The Magic of Colored Diamonds

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J. Thomas Jewelers Rochester Hills, MI

All the colors of the rainbow!

Colored diamonds are in the spotlight. They’re routinely breaking records at auction houses. They make headlines when set in celebrity engagement rings. And they’re gemological marvels of the rarest order.Seen in practically every color of the rainbow, colored diamonds are far rarer than diamonds in the D-to-Z color range. Only one out of 10,000 carats of fashioned diamonds displays fancy color, and a diamond’s chances of displaying intense color are even less – one in 25,000. Browns and yellows are the most common fancy colors. Red, green, purple and orange are the rarest.GIA® issued its first origin-of-color reports for colored diamonds in 1956. Backed by decades of research and the examination of thousands of colored diamonds, the GIA Colored Diamond Grading System has become the standard for evaluating these extremely rare gems. Current GIA Colored Diamond Grading Reports describe color grades using these terms: Faint, Very Light, Light, Fancy Light, Fancy, Fancy Dark, Fancy Intense, Fancy Deep and Fancy Vivid. Virtually every colored diamond sold at major auction houses has been graded by GIA.

Certified Color

“The GIA Colored Diamond Grading System allows a much more detailed description of diamond color than what had been available under the previous grading system. This has greatly facilitated trading of such stones worldwide, particularly as new sources expanded the quantities of stones in the market and the range of colors,” observed Russ Shor, senior industry analyst at GIA.
J. Thomas Jewelers Rochester Hills, MI
J. Thomas Jewelers Rochester Hills, MI

Pink Diamond

GIA researchers theorize that the color in many pink diamonds is caused by color centers that can selectively absorb light in the visible region of the spectrum. Color centers are the result of lattice defects, or imperfections in the arrangement of atoms in a crystal. These defects can sometimes cause pink graining in the diamond crystal.  
*The GIA-graded 59.60 carat Pink Star diamond sold for $71 million at the April 4, 2017 Sotheby's auction in Hong Kong. GIA researchers have not definitively determined the origin of this magnificent diamond’s pink color. Courtesy: Sotheby’s

Yellow

The presence of nitrogen causes a diamond to appear yellow. The intensity of the yellow color is dependent upon varying amounts of nitrogen. Yellow diamonds are considered to be a colored diamond and graded as “Fancy” when they fall outside the D-to-Z range (colorless to light-yellow).
*This Fancy Intense yellow cushion-cut diamond weighing 54.29 carats is the star in this necklace, while another 67.10 total carat weight of diamonds create a sublime contrast. Courtesy: Chatila
J. Thomas Jewelers Rochester Hills, MI

Colors of the Rainbow!

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Red Diamond

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Spice Brown Diamond

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Green Diamond

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Blue Diamond

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Black Diamond

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