ˈstibˌnīt noun
( -s )
Etymology: alteration (influenced by English -ite ) of obsolete English stibine stibnite, from French, from stib- + -ine
: a mineral Sb 2 S 3 consisting of native antimony trisulfide occurring in prismatic orthorhombic crystals of lead gray color and brilliant metallic luster that show a highly perfect cleavage and are striated vertically and also in massive form and providing the chief source of antimony (hardness 2, specific gravity 4.62)