Unique Tourmaline Necklace
An unusual parti-color tourmaline necklace and clasp are seen at the 2015 AGTA show in Tucson.
Iridescent Musgravite
A musgravite specimen’s inclusions result in an optical phenomenon unusual for the material.
Nonbead-Cultured Pearls from Strombus Gigas
Advances in pearl culturing are seen in a parcel of specimens from Strombus gigas gastropods.
Blue Chalcedony Partially Filled with Epoxy Resin
A carving identified as blue chalcedony shows evidence of epoxy resin treatment.
Introduction to the Micro-World of Gems
GIAラボで鑑別されたほぼ無色のメレーサイズのHPHT合成ダイヤモンド (英語)
The Bangkok lab examines near-colorless HPHT synthetic diamonds in melee sizes.
Unusual Combination of Inclusions in Synthetic Star Sapphire
A hexagonal boundary, usually found in natural material, is observed in a synthetic star sapphire.
Dual-Color Double Stars in Ruby, Sapphire, and Quartz: Cause and Historical Account
Examines a form of asterism comprising two six-rayed stars, one white and one that exhibits the stone’s bodycolor. Firsthand accounts and a survey of patent documents reveal that diffusion has been used to create or enhance this optical phenomenon in synthetic and possibly natural corundum since the 1950s.
Chemical Analysis of Zircon
Trace-element analysis is used to identify metamictization, treatment, and growth conditions of zircon.
Maine Pegmatite Workshop
A report summarizing the expeditions and lectures at the June 2015 pegmatite workshop in Poland, Maine.
Books: Imperial Jade of Burma and Mutton-Fat Jade of India
S.K. Samuel著 Imperial Jade of Burma and Mutton-Fat Jade of India: Mining, Trade, and Use from Antiquity to the Present(ビルマのインペリアル ジェードとインドの羊脂玉:採鉱と売買、古代から現代までの用途)の書評
Large Cat’s-Eye Emerald from Brazil
A translucent Brazilian emerald exhibiting pronounced chatoyancy is examined.
Digital Photomicrography for Gemologists
A guide to capturing gem inclusion scenes using practical equipment and techniques and the appropriate image-refining software.
3Dプリント:GIAが学生に「テクノロジー革命」に備えるべく指導
時間、精度、費用対効果についての評価に重点が置かれるジュエリーのデザインと製造において、3Dプリントが持つ可能性は驚くべきものです。
源流へのロマン:アフガニスタン
GIAのフィールド宝石鑑定士と共に、アフガニスタンのパンジシール渓谷にあるエメラルド鉱山への本格的な宝石採掘の冒険に出かけましょう。この地の屈強な住民たちは、ソ連による10度もの侵攻を撃退してきました。これまでほとんど誰も目にしたことのない、山岳地帯のエメラルド採掘現場をご覧ください。
コランダムにおける合成ルビーのオーバーグロースの分析
インクルージョン分析、UV-Vis-NIRおよびエネルギー分散型蛍光X線組成分析法、レーザーアブレーション誘導結合プラズマ質量分析法を用いた、コランダムにおける合成ルビーのオーバーグロースの分析。
Exhibition Review: Maker & Muse, Women of the 20th Century Art Jewelry
A review of the “Maker & Muse, Women of the 20th Century Art Jewelry” exhibition at Chicago’s Driehaus Museum.

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