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Bicolor tourmaline double cabochon displaying pink and white chatoyant bands on opposite sides.
Bicolour Double-Eye Tourmaline

A tourmaline displaying different colours of chatoyancy on opposite sides of a double cabochon is examined.

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Trigonal growth features on a blue cap tourmaline termination
Tourmaline Termination

The blue cap termination from a tourmaline crystal was preserved and polished, yielding a unique designer gem.

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Multi-colored gems are superimposed on an image of glacier peaks.
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Gems and Minerals from the Sub-Arctic

Circumnavigate the boreal reaches of the globe to explore gems from polar regions.

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Solution-Generated Pink Colour Surrounding Growth Tubes and Cracks in Blue to Blue-Green Copper-Bearing Tourmalines
Solution-Generated Pink Colour Surrounding Growth Tubes and Cracks in Blue to Blue-Green Copper-Bearing Tourmalines from Mozambique

Several transparent, faceted, blue to blue-green copper-bearing tourmalines containing growth tubes and cracks surrounded by sleeves of pink colour were examined for this report.

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Copper and tenorite inclusions in cuprian-elbaite tourmaline from Paraíba, Brazil

Inclusions of native copper and tenorite (CuO) were found in greyish-green elbaite from São José da Batalha, Paraíba, Brazil.

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Abstracts; Summer 1991

From the Summer 1991 issue of Gems & Gemmology, a summary of important gemmology-related articles published in other journals.

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

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

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Abstracts; Spring 1991

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

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Sri Lanka: The Gem Island

An overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.

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Tourmaline as an Inclusion in Zambian Emeralds

A report on Zambian emeralds with tourmaline inclusions.

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