is a sulfide
mineral of tin
with chemical formula: PbSnS2
. It occurs in hydrothermal veins and is sometimes mined as an ore
of tin. Teallite forms soft silvery grey mica-like plates and crystallizes in the orthorhombic
system. The Mohs hardness
is 1.5 to 2 and the specific gravity
Teallite was first described in 1904 from its type locality in Santa Rosa, Antequera, Bolivia. It was named for the British geologist Jethro Justinian Harris Teall (1849-1924).