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Abstract Header from the 2009 issue of Gems & Gemology
Abstracts; Summer 2009

This article, from the Summer 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.

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Gem Garnets in The Red-To-Violet Colour Range

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

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A New Classification for Red-To-Violet Garnets

An overview of previous red-to-violet garnet classification schemes and a proposal for a new one.

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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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Gem Andradite Garnets

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

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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 gemmological methods.

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