Afghan Emerald, Tajik Ruby, and Clarity-Enhanced Tourmaline
Updates on Afghan and Tajik materials, as well as treatment options to improve the clarity of various types of tourmaline.Updates on Afghan and Tajik materials, as well as treatment options to improve the clarity of various types of tourmaline.
マダガスカル、アンドラノンダンボ近郊の新しい鉱床から産出されたブルーサファイア (英語)
A recent rush in Madagascar yields new sapphire production.
Fordite from the Corvette Assembly Plant
Freeform fordite accumulated from a now-defunct method of painting automobiles was on display at Tucson.
GILC 2016
A report from the International Colored Gemstone Association’s Gemstone Industry & Laboratory Conference (GILC), held in Tucson, Arizona on February 1, 2016.
Large Colorless HPHT Synthetic Gem Diamonds from China (英語)
A report on the HPHT growth of large, gem-quality colorless synthetic diamonds in China
Paula Crevoshay’s American Collection, Plus Jewelry with Nontraditional Gemstones (英語)
Lesser-known gem materials are seen in pieces alongside a collection created as an artistic inheritance for future generations of jewelry fans.
Rare Emerald from China and Pink Sapphire from Sri Lanka
An emerald from a largely unexplored Chinese deposit is seen at Tucson, along with a pink sapphire recut after removal from a necklace.
Red Cordierite from Madagascar (英語)
The gemological properties of the first documented occurrence of red cordierite, from Madagascar, are examined.
“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.
Update on the Scorpion Tsavorite Mine
A look at the resumed operations and new production of Kenya’s Scorpion tsavorite mine.
Wheel of Light’s Mesmerizing Optics
A closer look at the Spectrum award-winning pendant from Nature’s Geometry.
Jewelry Television in Tucson
A look at JTV’s history, current activities, and impact on the industry.
Polymer-Treated Hessonite
Hessonite thought to be glass-filled is found to have been treated with polymer.