Gem News International
Gems & Gemology, Spring 2014, Vol. 50, No. 1

Mexican Opal – Tucson 2014

Duncan Pay
April 30, 2014
Rhyolite matrix containing opal-filled cavities
Figure 1. This rhyolite matrix specimen contains opal-filled cavities displaying play-of-color. Photo by Eric Welch; courtesy of Opalos & Artesanias Mexicanas.

Inside Tucson 2014

Explore the 2014 Tucson Gem show with GIA.
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Inside Tucson 2013

Eighteen interviews with trade experts, from one of the world’s largest gem shows.
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Learn More About Opal

Why We Love Opal
Explore opal history, research, quality factors, and more in the GIA Gem Encyclopedia.
 
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