 | "Rare stannite dark brown crystals and yellow calcite crystals on mica matrix. STANNITE, a rare mineral consisting of tin, copper and iron sulphide (a sulpho-stannate, Cu2FeSnS4), containing, when pure~ tin 27~5, copper 29.5%. It has a metallic lustre, and, when pure, is iron-black in color: more often, however, it is bronzeyellow, owing to tarnish or to the presence of intimately admixed chalcopyrite: for this reason it is known to miners as bell-metal-ore or as tin pyrites. The hardness is 31/2 and the specific gravity 4~45. It usually occurs as granular to compact masses, rarely as crystals." Location: YaoGang Xian Tungsten Mine, Hunan Province, China
Size: 10 x 8.2 x 4 cm.
Weight: 0.7 lbs.
Quantity Available: 1 Price:
$350.00 |