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Multi-colored gems are superimposed on an image of glacier peaks.

Article

Gems and Minerals from the Sub-Arctic

Sharon Bohannon, March 17, 2017

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

Three pieces of labradorite with yellow, blue and green flashes of color.

Article

Optical Effects of Phenomenal Cabochons

Sharon Bohannon, November 11, 2016

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

Article

Pyrope Garnet and Montana Sapphires Highlight Winter 2015 G&G

Russell Shor, February 1, 2016

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

Pastel Pyropes

Carol M. Stockton, June 1, 1988

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

Pyrope-Spessartine Garnets with Unusual Colour Behaviour

D. Vincent Manson and Carol M. Stockton, December 1, 1984

Unusual colour-change garnets.

Gem Andradite Garnets

Carol M. Stockton and D. Vincent Manson, December 1, 1983

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

Gem-Quality Grossular Garnets

D. Vincent Manson and Carol M. Stockton, December 1, 1982

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

Two Notable Colour-Change Garnets

Carol M. Stockton, June 1, 1982

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

Gem Garnets in The Red-To-Violet Colour Range

D. Vincent Manson and Carol M. Stockton, December 1, 1981

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

Abstracts; Summer 1991

Dona M. Dirlam

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

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