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Solution-Generated Pink Color Surrounding Growth Tubes and Cracks in Blue to Blue-Green Copper-Bearing Tourmalines
Solution-Generated Pink Color 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 color were examined for this report.

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

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

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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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Two Paraíba tourmalines showing asterism
Stars Are Out in Paraíba Tourmaline

Rare material from Brazil features four-ray stars under point-source light.

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

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

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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 grayish green elbaite from São José da Batalha, Paraíba, Brazil.

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Interesting Red Tourmaline from Zambia

A new source of red tourmaline is identified in Zambia.

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Tourmaline as an Inclusion in Zambian Emeralds

A report on Zambian emeralds with tourmaline inclusions.

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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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Abstracts; Spring 1991

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

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