Winter 2016 - Volume 52, Issue 4
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Glass imitations of Zultanite.
Color-Change Glass as a Zultanite Imitation

Two samples, presented as Zultanite, are revealed to be color-change glass.

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Fabergé egg from the McFerrin Collection.
Fabergé Symposium

A report from “The Wonder of Fabergé: A Study of The McFerrin Collection,” held at the Houston Museum of Natural Sciences in November 2016.

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Pieces of broken glass-filled ruby.
Durability of a Broken Glass-Filled Ruby

Heat treatment and glass filler are discovered in a ruby after it is broken during the jewelry setting process.

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Sections of imitation boulder.
Imitation Rubellite Boulders

Specimens presented as rubellite tourmaline rough are found to be resin imitations with lead inserts.

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Trapiche-type sapphire from Tasmania.
Trapiche-Type Sapphire from Tasmania

A rare Tasmanian trapiche-type sapphire, found during a field expedition, is examined.

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Decorated jadeite pendant.
“Decorated” Jadeite Jade in the Chinese Market

An examination of jadeite decorated with smaller jadeite ornaments.

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Rough blue sapphire found near Ambatondrazaka.
Sapphire Rush Near Ambatondrazaka, Madagascar

A newly found deposit of sapphire in Madagascar is explored.

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Dark blue tourmaline from Afghanistan.
Blue Dravite-Uvite Tourmaline from Koksha Valley, Afghanistan

A new find of tourmaline yields surprising results.

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