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Merelaniite whisker inclusions in tanzanite.
Merelaniite Inclusions in Tanzanite

A recently identified mineral is found, in whisker-like form, in a gem-quality tanzanite host.

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An iridescent cleavage in tanzanite
Iridescent Inclusion in Tanzanite

A tanzanite displayed crystallographically aligned, vividly iridescent colours resulting from fine separations along the stone’s cleavage planes.

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Abstracts; Autumn 1991

This article, from the Autumn 1991 issue of Gems & Gemology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemology.

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