A yellowish green specimen with horsetail-like inclusions is found to be glass rather than demantoid garnet.
Read More
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.
Read MoreLow levels of radioactivity were found in some greenish yellow to yellow-green (peridot-like) synthetic spinel-and-glass triplets, mirror-backed glass rhinestone chatons and fully fashioned glass rhinestones.
Read More
Similarities between natural spinels - with intense blue colour - and synthetic material, have led to difficulties in the recognition of the natural stones by traditional methods.
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 More
It is a rare occurrence when a diamond simulant submitted to a GIA laboratory turns out to be a natural gemstone.
Read More
You are being redirected to GIA Alumni Association, LLC.
