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Petrochemical Characteristics and Genesic Significance of Luodian Jade from Guizhou

Luodian jade is a newly discovered nephrite variety in 2009 at the Luodian county of Guizhou province, China.

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Copper-Bearing Minerals of Colorado

The state of Colorado has produced some significant copper-bearing mineral specimens.

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Perles de Culture de la Mer de Cortez: Les Belles Inconnues [Unknown Beauties: Cultured Pearls from the Cortez Sea]

The first part of the article gives a historical survey of the Cortez Sea (Gulf of California) pearls, followed by an account of the actual situation.

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Major Crocoite Discoveries at the Adelaide Mine, Tasmania

Crocoite was firstly discovered in Urals in 1766 and named as crocoise in 1832.

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Peridot, Pyroxene, and Plagioclase: Mantle Megacrysts from Lunar Crater Volcanic Field in Nevada

Megacrysts within xenoliths transported by explosive volcanic eruptions to the surface fascinate geologists, mineralogists and gemologists because they are fingerprints of the Earth’s upper mantle and possible collective items of crystal hunters.

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Aviat Diamonds: A Window into the Deep Lithospheric Mantle Beneath the Northern Churchill Province, Melville Peninsula, Canada

Aviat Diamonds: A Window into the Deep Lithospheric Mantle Beneath the Northern Churchill Province, Melville Peninsula, Canada

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Une Découverte Exceptionnelle de Béryls Gemmes à Chaves, District de Vila Real, Portugal [An Exceptional Find of Gemmy Beryls at Chaves, District of Vila Real, Portugal]

The numerous pegmatites in Northern Portugal are known as sources of fine mineral specimens for mineral collectors.

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Study Helps Identify Nepalese Kyanite

Commentary on a 2013 German article, translated as "Sapphire-blue kyanite from Nepal."

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Abstracts; Fall 1995

This article, from the Fall 1995 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.

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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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