stibnite

A lead-gray mineral, Sb₂S₃, that is the chief source of antimony.

Native antimony trisulphid (Sb₂S₃), a mineral usually occurring in orthorhombic crystals, sometimes of great size, often acicular; and also massive. See cut under acicular.

A mineral of a lead-gray color and brilliant metallic luster, occurring in prismatic crystals; sulphide of antimony; — called also antimony glance, and gray antimony.

A grey mineral, Sb2S3, that is the main ore of antimony; used in ancient times as the cosmetic kohl.

a soft grey mineral; the chief ore of antimony