Sperrylite is a platinum with formula PtAs2 and is an opaque metallic tin white mineral which crystallizes in the isometric system with the pyrite group structure. It forms cubic, octahedral or pyritohedral crystals in addition to massive and reniform habits. It has a Mohs hardness of 6 - 7 and a very high specific gravity of 10.6.
It was discovered by Francis Louis Sperry , an American chemist, in 1889 at Sudbury.
The most important occurrence of sperrylite is in the nickel ore, Canada complex of the Bushveld and the Oktyabr'skoye copper-nickel deposit of the Eastern-Siberian Region, Russia.