Galena, Lead

Galena, a natural mineral form of lead sulfide, is a natural source of silver and the main ore for lead. It's one of the most abundant and widely distributed sulfide minerals. It is often associated with the minerals sphalerite, calcite and fluorite. One of Galena's earliest uses was in the eye cosmetic kohl used by the ancient Egyptians.

It's the official state mineral of Kansas, Missouri, and Wisconsin!