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Lord Mahavira carving
A Remarkably Large Amblygonite-Montebrasite Carving

A carving originally thought to be beryl is examined and identified as amblygonite-montebrasite.

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インド産ルビーの4画像
別名 - FA92A1 ルビーおよびサファイアの採鉱へのリンク

2.39カラットのアベンチュレッセンスを放つ日長石(右)は、インド南部のタミルナドゥ州産です。

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GILC 2015
GILC 2015

A report from The International Colored Gemstone Association’s Gemstone Industry & Laboratory Conference (GILC), held in Tucson, Arizona on February 2, 2015.

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Blue chrysocolla in quartz
Chrysocolla In Quartz

A gemological examination of chrysocolla in quartz from Tucson’s AGTA show.

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Foldscope
The Foldscope and Its Gemological Applications

The author tests the suitability of a portable paper microscope, called the Foldscope, for gemological application.

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The Second International Diamond School
International Diamond School

A report from the Second International Diamond School, held in Brixen, Italy in January 2015.

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Baroque Chinese freshwater cultured pearls
Chinese Freshwater Pearl Culturing, Overall Market Summary

A review of Chinese freshwater cultured pearl production, with an update on the market for Tahitian, South Sea, and akoya cultured pearls.

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Daniel and Andre Assaf of the Tsavorite Factory
Tsavorite Garnet and Mahenge Red Spinel

A discussion of the current demand for tsavorite and spinel in today’s market.

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Scapolite cabochons
Iridescent Scapolite

The Carlsbad lab examines a fascinating rainbow scapolite cabochon.

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Four “ginger” garnets
Ginger Garnet, “Fancy” Tanzanite

Garnets and a wide variety of tanzanite at the Tucson gem shows.

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