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These five tanzanite samples (0.39–0.82 ct) proved to be colour-coated with titanium. Photo by Don Mengason.

Article

Titanium-Coated Tanzanite

Amy Cooper and Nathan Renfro, February 7, 2014

For the first time, GIA's laboratory has examined tanzanite colour-coated with titanium.

Abstracts; Autumn 1991

Dona M. Dirlam

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.

Abstract Header from the 2009 issue of Gems & Gemology

Abstracts; Summer 2009

Brendan M. Laurs, Thomas W. Overton

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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