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

Jade or "Fei Cui" are trade names for a stone that typi- cally contains only one or more main minera

When it comes to the geographic origin of gems, curiously enough, historians sometimes put forward p

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