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

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

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Three pieces of labradorite with yellow, blue and green flashes of color.
Article
Optical Effects of Phenomenal Cabochons

Learn how the structure, inclusions and properties of some gemstones interact with light to create unusual visual effects.

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Article
Pyrope Garnet and Montana Sapphires Highlight Winter 2015 G&G

G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.

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Pastel Pyropes
Pastel Pyropes

Pyrope garnets occur in near-colourless to light orange and pink, as well as the familiar red.

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Pyrope-Spessartine Garnets with Unusual Colour Behaviour

Unusual colour-change garnets.

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Gem Andradite Garnets

Gem-quality andradites are easy to distinguish chemically from other types of gem garnets.

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Gem-Quality Grossular Garnets

The gemmological classification and identification of gem grossular garnets is examined.

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Two Notable Colour-Change Garnets

The gemmological properties and chemical compositions of two unusual colour-change garnets are reviewed.

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Gem Garnets in The Red-To-Violet Colour Range

This article shows that the characteristic of colour appears to have little correlation with variations in bulk (not trace) composition or physical properties.

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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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