Sourcing Stones with Columbia Gem House
Thoughts from a longtime Tucson exhibitor on responsible practices and the changing market trends.
The Rock Hound: Muzo Emeralds and Ethical Practices
Susi Smither discusses her sustainable, responsible, and ethically based business practices.
Trapiche Emerald from Colombia
The examination of a nearly complete trapiche emerald crystal–which are difficult to obtain–is consistent with the findings of previous studies.
Diamonds from the Deep: How Old Are Diamonds? Are They Forever?
The age of something is fundamental. Humans, animals, wine, cars, and antiques are viewed and understood in the context of their age.
CVD Layer Grown on Natural Diamond
A composite of synthetically grown and natural diamond was recently identified by the Carlsbad laboratory.
Native Copper Inclusions in Indonesian Purple Chalcedony
Indonesian purple chalcedony containing interesting native copper inclusions is a first for the Carlsbad lab.
Jeff Hapeman: Stories from a Gem Cutter
Jeff Hapeman of Earth’s Treasury (Westtown, Pennsylvania) loves a gemstone with a good story.
Trapiche-Like Ruby from the Batakundi Mine, Kashmir
Trapiche-like ruby from Kashmir shows a well-formed fixed six-rayed pattern.
CIBJO Blue Book and “Do’s and Don’ts” Guide on Responsible Sourcing
The World Jewellery Confederation (CIBJO) released the first edition of the Responsible Sourcing Book in January 2019.
Recycled Gemstones from Perpetuum Jewels
A wholesaler supplying the bridal market with recycled gemstones and antique cuts shares his thoughts on the market and on responsible practices.
Observations on the Heat Treatment of Basalt-Related Blue Sapphires
Researchers from GIA’s Bangkok laboratory seek to identify low-temperature heat treatment in basalt-related blue sapphires.
ダイヤモンドの研究、大陸の形成に関する手がかりを与える
ダイヤモンドに閉じ込められた鉱物インクルージョンが大陸の構造を解明し、ダイヤモンドが形成された年代をGIAの研究員が判断する際の手がかりとなります。
デビアスによる供給の増加、環境に関する主張に対する連邦取引委員会の警告
デビアスは変動に対応し、Federal Trade Commission(連邦取引委員会)はラボで製造されたダイヤモンドに関する警告を発行します。また、302.37カラットのGraff Lesedi La Rona(ザ グラフ レセディ ラ ロナ)の詳細が発表されます。
Curved Banding in Flame-Fusion Synthetic Sapphires
The appearance of curved banding under short-wave UV easily identifies flame-fusion synthetic sapphire.
ツーソン訪門後、地質学教授兼ウェブサイト運営者が学校に戻る決心をする
地質学者が、自身で運営する地球科学のウェブサイト、Geology.comへの訪問者に宝石に関するより多くの情報を提供できるようGGを取得します。

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