History of Garnet Mining and Cutting in the Austro-Hungarian Monarchy
Karl Schmetzer
Amber from the Thanbaya Gaing Coal Mine, Minbu Township, Magwe Region, Myanmar
Amber was recently discovered by local coal miners at the Thanbaya Gaing Coal mine located 6.5 km no
On the nature of blue rose quartz
Over the past several years, the market for pink-coloured rose quartz has been augmented by variants
Blue sapphire from Malacacheta of Minas Gerais, Brazil
Malacacheta, located in Minas Gerais, Brazil, is renowned for its alexandrite deposits and com-plex