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imperial flame topaz
Article
Cutting the ‘Imperial Flame’ Topaz

Duncan Pay

April 28, 2016

See how gem artist Alexander Kreis transforms a rough topaz crystal into a gem cutting masterpiece.

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Pinkish orange inclusion in topaz.
Quarterly Crystal: Triplite in Topaz

John I. Koivula

August 3, 2016

The first triplite inclusion in a topaz host is examined.

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Brazilian colorless topaz with molybdenite inclusions.
Molybdenite in Topaz

John I. Koivula

November 23, 2015

An unusual host-inclusion association is revealed when cluster of crystals in a colorless topaz is discovered to be molybdenite.

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Amethyst with a large aqueous primary fluid inclusion
Large Aqueous Primary Fluid Inclusion in Amethyst

Ziyin Sun and Jonathan Muyal

November 7, 2016

A strikingly large primary fluid inclusion with a gas bubble was seen in a Moroccan amethyst.

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Amethyst crystals from Morocco
Moroccan Amethyst: Mining and Marketing

Andrew Lucas and Tao Hsu

May 8, 2017

Insight into amethyst mining activity in Morocco.

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Imitation Rainbow Moonstone Assemblage

Amy Cooper, Nathan Renfro, and Tara Allen

October 17, 2013

Examination of an imitation rainbow moonstone assemblage containing plastic-coated gypsum.

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Mixed-cut Oregon sunstone
Oregon Sunstone Update

Duncan Pay

April 30, 2015

An review of the Oregon sunstone seen at the Tucson gem shows.

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Article
A Sunstone Odyssey, Part 1: The Ponderosa

Duncan Pay, Robert Weldon, and Kevin Schumacher

October 23, 2013

The first of a three-part series exploring Oregon’s state gem reports on a July 2013 visit to the Ponderosa mine, a prolific sunstone source surrounded by majestic ponderosas.

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Large sunstone rough from the Ponderosa mine in Oregon
Ponderosa Sunstone Update

Duncan Pay

May 11, 2018

John Woodmark provides an update on the Ponderosa sunstone mine in Oregon.

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