Boulder opal is becoming more and more popular. Australia’s central Queensland is home to more than a dozen of sources of this stone. Come with GIA field gemmologists to find out more about this unique gem.
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Lightning Ridge is the world capital of fine black opals, the most desired of all opals. In June 2015 a group of GIA field gemmologists visited this legendary town in New South Wales, Australia. Come with us to explore this important source of fine opals.
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A summary of the content found in the Summer 2016 issue of Gems & Gemology.
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Documents a trip to the renowned opal fields of Lightning Ridge, Koroit, Yowah and Quilpie.
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G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.
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The Stayish mine in Ethiopia’s Wollo province has been producing black opal since 2013.
Read MoreAn examination of play-of-colour opal from Mexico and its variety of inclusions.
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This article, from the Summer 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.
Read MoreThis article, from the Winter 1991 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.
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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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