Minerals and Metals in Ancient India v2.c47.28

v2.c47.28

*Cassiterite* : Main ore of tin. SnO₂. Hardness 6-7. sp. gr. 6.8-7.1 Adamantine luster : Colour brown or black. Occurs in granitic rock or pegmatites. Also alluvial washings. Occurs in Malay Peninsula, coast of Sumatra etc.