Classifying Emerald Clarity Enhancement at the GIA Gem Trade Laboratory
One of the greatest concerns with emerald filling is the degree of clarity enhancement such treatment represents
Gota de Aceite: Nomenclature for the Finest Colombian Emeralds
The finest and rarest emeralds are sometimes said to have an optical effect called gota de aceite.
Tucson: A Showcase of Colored Gemstone Innovation
An overview of the Spring 2016 Gems & Gemology content.
Garnets, Sapphires, Opals, and Tarnish on High-Purity Gold
An overview of the Winter 2015 Gems & Gemology content.
Trapiche and More...
Colombia’s unique trapiche emeralds exert a fascination for many gemologists.
Large Cat’s-Eye Emerald from Brazil
A translucent Brazilian emerald exhibiting pronounced chatoyancy is examined.
The Oil Treatment of Emeralds in Bogotá, Colombia
This article focuses on Colombian emeralds and gives a detailed explanation of the oiling process as observed by the author.
Abstracts; Summer 2009
This article, from the Summer 2009 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.