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FANCY COLOR DIAMOND
Dazzling brilliance. Captivating color. The planet’s most valued gems are fancy color diamonds.
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Two Treated-Color Synthetic Red Diamonds Seen in the Trade
Two dark brownish red faceted stones, recently submitted to the GIA Gem Trade Laboratory for standard origin-of-color reports, were found to be treated synthetic diamonds.
Diamond with High Concentration of Nickel
Cape Diamond with Yellow Phosphorescence
Irradiated and Annealed Blue Type Ia Diamond
Examination shows that a diamond was subjected to a multi-step process in order to introduce a blue color.
Natural Orange Diamond with Unusual Absorption Features
Two diamonds analyzed in the New York laboratory lead to a newly identified cause of orange color.
Cloud Inclusions Causing Fancy Light Blue Color in Diamond
The New York laboratory reports on the cause of color in a Fancy Light grayish blue diamond.
Orange Diamond with Unusual Color Origin
GIA recently examined a rare orange diamond that demonstrated the complexity of diamond color origin.
Harry Winston: A Story Told in Diamonds
An overview of some of the most fabulous and famous diamonds that Harry Winston has known.
HPHT-Processed Natural Type Ia Diamond
New York laboratory receives resubmission of HPHT-treated diamond that changed from a dark yellowish brown to a deep yellow-orange during treatment.
Unusual Laser Drill Holes in a Laboratory-Grown Diamond
Unusual laser drill holes identified in a laboratory-grown Fancy yellow cushion modified brilliant diamond.
A Large Irradiated Green-Yellow Diamond
Three Notable Fancy-Color Diamonds: Purplish Red, Purple-Pink, and Reddish Purple
The description and properties of three fancy-color diamonds auctioned at Christie's.
