G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.
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An opal featuring a rare six-rayed star is examined in GIA's Bangkok lab.
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Matrix opal from Andamooka, in South Australia, is a precious opal-included porous rock that is commonly colour enhanced (carbon impregnated) to imitate the highly prized black opal from Lightning Ridge in northern New South Wales, Australia.
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.
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