Hematite

Mohs hardness 5.5-6.5; metallic to sub-metallic luster; dark grey to silver-black color when polished; reddish-brown streak; trigonal crystal system; metallic reflectivity; specific gravity ~5.26

Forms through sedimentary precipitate in banded iron formations, hydrothermal veins, or metamorphic environments via contact metamorphism

Primary ore of iron, polished beads and cabochons for jewelry, decorative polished palm stones, radiation shielding, anti-corrosive pigments

Despite its dark metallic silver appearance when polished, powdered hematite and its streak are bright reddish-brown, which inspired its name from the Greek word for blood ('haima')

Identified by high density/heaviness for its size, metallic mirror-like finish, non-magnetic or weakly magnetic nature, and characteristic red streak test; commonly found in Brazil, Australia, China, Lake Superior region USA, and South Africa