Chemical Analysis of Zircon
Trace-element analysis is used to identify metamictization, treatment, and growth conditions of zircon.
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.
The Beauty and Value of Inclusions, Plus Double Stars and Corundum from Tajikistan
Synthetic Sapphire with Diffusion-Induced Color and Star
Diffusion treatment is used to induce color and asterism in a colorless synthetic sapphire.
LPHT-Annealed Pink CVD Synthetic Diamonds (英語)
The New York lab examines three pink CVD synthetic diamonds which have received LPHT annealing treatment.
Maine Pegmatite Workshop
A report summarizing the expeditions and lectures at the June 2015 pegmatite workshop in Poland, Maine.
Unique Tourmaline Necklace
An unusual parti-color tourmaline necklace and clasp are seen at the 2015 AGTA show in Tucson.
Rock Creek（ロッククリーク）のサファイア鉱床に関する最新情報 (英語)
An overview of recently expanded sapphire production at the Gem Mountain mine near Philipsburg, Montana.
Nonbead-Cultured Pearls from Strombus Gigas
Advances in pearl culturing are seen in a parcel of specimens from Strombus gigas gastropods.
Crimson Prince Ruby from Namya
Large Cat’s-Eye Emerald from Brazil
A translucent Brazilian emerald exhibiting pronounced chatoyancy is examined.
Strong Pinkish Purple Freshwater Bead-Cultured Pearls
Baroque Pearls
Green Nephrite Jade Attracts Buyers in Tucson
An update on the nephrite jade market from the 2015 GJX show.
Large Namibian Demantoid Garnet
Diamond Slices
Fluorite Sphere with Phosphorescent Coating
Unusual Combination of Inclusions in Synthetic Star Sapphire
A hexagonal boundary, usually found in natural material, is observed in a synthetic star sapphire.
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