The proper use and limitations of IR spectroscopy for identifying natural versus synthetic amethyst of various types have been investigated, focusing on the region 3800–3000 cm-1.
Read MoreWhen microscopic identification is not feasible, FTIR spectra at high resolution (0.5 cm–1) can distinguish natural and synthetic amethyst.
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G&G Brief presents an overview of the content of the Spring 2015 issue of Gems & Gemology.
Read MoreFrom the Summer 1991 issue of Gems & Gemmology, a summary of important gemmology-related articles published in other journals.
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Twenty-six peridot samples from the Esquel pallasite meteorite and 27 samples from 10 terrestrial sources were studied by laser ablation.
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Natural gemstones are typically far more valuable than synthetic ones, so being able to identify them correctly is a powerful skill.
Read MoreThis article, from the Autumn 1991 issue of Gems & Gemology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemology.
Read MoreAn overview of the plentiful and various gem materials being discovered and produced in Afghanistan.
Read MoreWhere there are no inclusions or colour zoning, the presence of Brazil twinning in the natural amethyst will usually make the distinction.
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