History of Garnet Mining and Cutting in the Austro-Hungarian Monarchy

Amber was recently discovered by local coal miners at the Thanbaya Gaing Coal mine located 6.5 km no

Fancy colour diamonds that derive their colour from nitro- gen-related defects (such as N3/N2 center

Corundum, encompassing the highly prized ruby and sapphire varieties, stands as a cornerstone of the