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Pyrope Garnet and Montana Sapphires Highlight Winter 2015 G&G

G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.

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Demantoid from Val Malenco, Italy
Demantoid from Val Malenco, Italy: Review and Update

New data are presented for demantoid from Val Malenco, Italy, as obtained by classical gemological methods.

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Topazolite
First Discovery of Topazolite in Mexico

Reports on the first discovery of fine topazolite garnet crystals in Mexico.

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New Chromium- and Vanadium-Bearing Garnets from Tranoroa, Madagascar

Pyrope-spessartine garnets from Tranoroa, in southern Madagascar, contain appreciable Cr and somewhat lower V contents.

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Rounded Garnet Crystals
Bohemian Garnet – Today

Red garnets have been mined in the Bohemian Hills of Czechoslovakia since the 16th century.

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A Proposed New Classification for Gem-Quality Garnets

Eight garnet species are defined and methods of identification are described.

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Pyrope-Spessartine Garnets with Unusual Color Behavior

Unusual color-change garnets.

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Gem Andradite Garnets

Gem-quality andradites are easy to distinguish chemically from other types of gem garnets.

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Two Notable Color-Change Garnets

The gemological properties and chemical compositions of two unusual color-change garnets are reviewed.

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Gem Garnets in The Red-To-Violet Color Range

This article shows that the characteristic of color appears to have little correlation with variations in bulk (not trace) composition or physical properties.

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