Ring with a CVD Synthetic Melee Diamond (英语)
A round-cut specimen set in a ring is the first mounted CVD synthetic melee diamond identified by GIA.
最大的蓝色高温高压合成钻石 (英语)
Analysis of a 5.03 ct HPHT-grown blue synthetic diamond, the largest ever examined by GIA.
Afghan Emerald, Tajik Ruby, and Clarity-Enhanced Tourmaline
Tucson: A Showcase of Colored Gemstone Innovation
Gem-Quality Serpentine from Val Malenco, Central Alps, Italy
A detailed characterization of serpentine from this mountain locality, focusing on its use as a gem material.
Blue Sapphires From a New Deposit Near Andranondambo, Madagascar (英语)
A recent rush in Madagascar yields new sapphire production.
Wheel of Light’s Mesmerizing Optics
Analysis of Yellow Diamond Melee for Color Treatment and Synthetics (英语)
A parcel revealed to contain natural, treated, and synthetic diamonds reinforces the importance of identification.
GILC 2016
Fordite from the Corvette Assembly Plant
An Introduction to Photoluminescence Spectroscopy for Diamond and Its Applications in Gemology
Presents the underlying physics and methodology of this analytical technique, which has become an essential tool in identifying treated and synthetic diamonds.
Update on the Scorpion Tsavorite Mine
A look at the resumed operations and new production of Kenya’s Scorpion tsavorite mine.
Rare Emerald from China and Pink Sapphire from Sri Lanka
Paula Crevoshay’s American Collection, Plus Jewelry with Nontraditional Gemstones (英语)
Lesser-known gem materials are seen in pieces alongside a collection created as an artistic inheritance for future generations of jewelry fans.
Large Colorless HPHT Synthetic Gem Diamonds from China (英语)
A report on the HPHT growth of large, gem-quality colorless synthetic diamonds in China.
A Fantastic Display of Phase Changes in a Sapphire’s Fluid Inclusion
Phase changes illustrate the temperature and pressure conditions in the fluid inclusion system of a Sri Lankan sapphire.
“Star of David” Spinel Twin Crystal with Multiphase Inclusions from Mogok
A rare spinel, featuring a Star of David pattern and multiphase inclusions, is examined in Bangkok.
Emerald/Emerald Doublet
An unusual doublet consisting of two sections of natural emerald is examined the Tokyo lab.
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