Black tin is the raw ore of tin, usually cassiterite, as sold by a tin mine to a smelting company. After mining, the ore has to be concentrated by a number of processes to reduce the amount of gangue it contains before it can be sold. It contrasts with white tin, which is the refined, metallic tin produced after smelting. The term `black tin` wa.....
Found on
http://en.wikipedia.org/wiki/Black_tin
Mining term for cassiterite (tin ore).
Found on
http://www.metalbulletin.com/Glossary.html
Black tin is the name given to tin ore when dressed, stamped, and washed ready for smelting, forming a black powder.
Found on
http://www.probertencyclopaedia.com/browse/GB.HTM
No exact match found.
