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…

GemWorld articles are accessible by GemGuide members only.
Already a member?

Click here and Login


To access our archive of articles and get many other great features and benefits, become a member now!

Become a member