Specific gravity: 4.3 to 4.5
Colour: Grey, black with an olive-green tint, tarnishes pale blue
Common impurities: Ag,Zn,Cd,In
Stannite occurs widely in tin-bearing hydrothermal vein deposits,
(Webmin, Dana, HOM)
associated with chalcopyrite, sphalerite,
pyrite, cassiterite and
wolframite (material intermediate between hübnerite and
At the San Jose mine, Oruro, Bolivia, andorite crystals perched on stannite crystals are found as floaters anclosed in acicular boulangerite (MinRec 37.3.242).
At Llallagua, Potosi, Bolivia, stannite is not common, but it does form good cryatls. It is associated with sphalerite and sometimes replaces it, and also is commonly associated with franckeite and cylindrite (MinRec 27.2.152-153).
At Yaogangxian, Hunan, China, stannite sometimes occurs well crystallised on quartz, and is associated with all other sulphides in the deposit; these include arsenopyrite, berthierite, bismuthinite, bornite, boulangerite, bournonite, chalcopyrite, galena, jamesonite, marcasite, molybdenite, pyrite, pyrrhotite, semseyite, sphalerite, stibnite and tetrahedrite (R&M 80.1.56, MinRec 42.6.594-597).
Back to Minerals