See Gem As
Tools
Research
Observations on GE-Processed Diamonds: A Photographic Record
Observations made at GIA on 858 GE-processed diamonds revealed several interesting features that may be diagnostic of this kind of diamond. Specifically, a significant percentage exhibited a slightly hazy appearance, noticeable internal graining, and other unusual internal features.
Cape Diamond with Yellow Phosphorescence
Diamond Inclusions “Watching a Fly”
Crystal inclusions in a natural diamond resemble a unique scene.
The GEM DiamondMaster and the Thermal Properties of Gems
Thermal properties and the potential applications of the GEM DiamondMaster in testing them.
Dual-Color Double Chatoyancy in Emerald
An emerald displaying dual-color light green and white double chatoyancy is examined in the Tokyo laboratory.
X-Ray Fingerprinting Routine for Cut Diamonds
A simplified form of X-ray topography can fingerprint faceted diamonds to aid in their recovery from loss or theft.
Buff-Top Round Diamond
The New York lab recently examined several diamonds with an interesting variation on the cabochon.
Pseudo-Synthetic Growth Structure Observed in Natural Diamond
This stone was a good example of a very rare natural diamond exhibiting synthetic growth characteristics.
Kaleidoscope of Butterflies and Tiny Fish in Diamonds
Feather inclusions observed in two natural diamonds evoke scenes in nature.
Mask Inhabiting a Natural Diamond
The mirror image of a feather inclusion in a natural diamond resembles a theater mask.
Harry Winston: A Story Told in Diamonds
An overview of some of the most fabulous and famous diamonds that Harry Winston has known.
