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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.

"Opalite": Plastic Imitation Opal with True Play-Of-Colour

John I. Koivula and Robert C. Kammerling, March 1, 1989

A plastic imitation opal that shows true play-of-colour was advertised as "new" and offered for sale under the trade name "Opalite" at the Gem and Lapidary Dealers Association (GLDA) Tucson show in February 1988.

Opals from Opal Butte, Oregon

Kevin Lane Smith, December 1, 1988

Recent mining at Opal Butte in northeastern Oregon has produced a wide variety of large flawless opals.

Abstract Header from the 2009 issue of Gems & Gemology

Abstracts; Winter 2009

Brendan M. Laurs, Thomas W. Overton

This article, from the Winter 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.

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