Gems & Gemology’s 7 Most Unusual Encounters from 2019
Check out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.
Heat Treating Corundum: The Bangkok Operation
An overview of the potential effects that heat treatment can have on corundum.
Abstracts; Summer 1991
From the Summer 1991 issue of Gems & Gemmology, a summary of important gemmology-related articles published in other journals.