See Gem As
Tools
Research
Laboratory-Grown Diamonds: An Update on Identification and Products Evaluated at GIA
Reviews the advancements and major trends in laboratory-grown diamonds observed by GIA since 2007.
Large Natural Diamonds with Asteriated Cloud Inclusions
Two natural diamonds containing cloud inclusions that resemble stars are examined in the Carlsbad laboratory.
CVD with “Ancient Text” Clouds
A CVD-grown diamond exhibits an interesting clarity characteristic.
The Lengthy Vertical Journey of Superdeep Diamonds
Explores the journey of superdeep diamonds to the earth’s surface.
Quarterly Crystal: Diamond in Diamond
Examination of a South African diamond reveals an eye-visible diamond inclusion.
Trigon Party on a Diamond
Large CVD-Grown Diamond Resubmitted after HPHT Treatment
Distinctive Feather in Diamond
A feather observed in a natural diamond resembles a large reptile.
Cross in Natural Diamond
Eclogite: Diamond-Encrusted Ancient Seafloor
Explores eclogitic diamonds, which make up a significant portion of the gem diamond market, and what they reveal about Earth’s dynamic processes.
Inclusion Resembling a Gada in Diamond
Spring 2022 Auction Highlights
Large near colorless, blue, and yellow diamonds broke auction records at Christie’s and Sotheby’s in the first half of 2022.
