Opal Quality Factors
Individual opals are as diverse as snowflakes or fingerprints and can vary widely in appearance and quality. Learn about the factors that make opals so desirable!
Summer 2016 G&G: Diamonds from Diavik, Responsible Sourcing and Fabergé Cossack Figures
A summary of the content found in the Summer 2016 issue of Gems & Gemology.