A recently identified mineral is found, in whisker-like form, in a gem-quality tanzanite host.
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A tanzanite displayed crystallographically aligned, vividly iridescent colours resulting from fine separations along the stone’s cleavage planes.
Read MoreThis 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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