Tags: Chemical Substance, Mineral.
Laurite is an opaque black metallic ruthenium sulfide mineral with formula: RuS2. It crystallizes in the isometric system. It is in the pyrite structural group. Though rare it occurs in many parts of the world. Laurite has a Mohs hardness of 7.5 and a specific gravity of 6.43. It can contain osmium rhodium iridium and iron substituting for the ruthenium.