Hematite
Hematite is iron oxide and the most important iron ore. It is metallic gray to black and leaves a reddish-brown streak when rubbed. It has a hardness of 5.5 to 6.5 on the Mohs scale. Polished hematite is made into beads and jewelry.
Hematite is iron oxide and the most important iron ore. It is metallic gray to black and leaves a reddish-brown streak when rubbed. It has a hardness of 5.5 to 6.5 on the Mohs scale. Polished hematite is made into beads and jewelry.