Vladimir S. Balitsky, Denis V. Balitsky, June 1, 2004
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 MoreDona M. Dirlam
From the Summer 1991 issue of Gems & Gemmology, a summary of important gemmology-related articles published in other journals.
Read MoreGIA, September 29, 2014
Natural gemstones are typically far more valuable than synthetic ones, so being able to identify them correctly is a powerful skill.
Read MoreDona M. Dirlam
This 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 MoreRobert Crowningshield, Cornelius Hurlbut, September 1, 1986
Where 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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