Photoatlas of Gemstone Spectra for Gemology Students by Richard D. Armstrong, RGA, GG, GP

Posted on May 1, 2015 by Reviewed by Cigdem Lule, PhD., FGA, GG (GIA)

Obtaining a gem’s spectrum via a handheld spectroscope can be difficult, if not intimidating for most gemology students and some practicing gemologists. However, the use of visible spectrum is vital to the proper identification of…

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