Found, Lost, and Found Again: The Geological and Gemological Significance of the Salininha Emerald Deposit, Brazil

One of the challenges facing gemologists today is the detec- tion of low temperature (below 1200°C)

Over the past several years, the market for pink-coloured rose quartz has been augmented by variants

Purple jadeite, renowned for its distinctive purple hues and rich cultural connotations, is highly a