8 Photos
Stannite
Chemical Formula	Cu2FeSnS4
Species	Sulfides
Crystal System	Tetragonal
Mohs Scale	4
Specific Gravity	4.3-4.5
Color	Steel-gray to iron-black, may tarnish blue
Streak	Black
Luster	Metallic
Diaphaneity	Opaque
Cleavage	Poor/IndistinctIndistinct on
Fracture	Irregular/Uneven
Crystal Habit：Rarely as pseudo-octahedral crystals also massive, granular, and disseminated

Stannite is a mineral, a sulfide of copper, iron, and tin. The chemical formula Cu₂FeSnS₄. Zinc commonly occurs with the iron and trace germanium may be present. Stannite is used as an ore of tin, consisting of approximately 28% tin, 13% iron, 30% copper, 30% sulfur by mass. It is found in tin-bearing, hydrothermal vein deposits occurring with chalcopyrite, sphalerite, tetrahedrite, arsenopyrite, pyrite, cassiterite, wolframite. Also known as bell metal ore.

The name comes from the Latin for tin: stannum. It was first described in 1797 for an occurrence in Wheal Rock, St. Agnes, Cornwall, England.