[mass noun] A lead-grey mineral, typically occurring as striated prismatic crystals, which consists of antimony sulphide and is the chief ore of antimony.
- ‘When exposed by breaking open the quartz, the paakkonenite crystals are virtually identical in appearance to stibnite and exhibit a similar ease of bending.’
- ‘The ore consists of enormous veins of massive stibnite.’
- ‘Commonly associated minerals include orpiment, stibnite, a variety of sulfides and sulfosalts, calcite, and barite.’
- ‘There were shops full of green and purple fluorite, ferberite and arsenopyrite, and spessartine and stibnite.’
- ‘There will be azurite, pyromorphite, marvelous twinned calcite, stibnite that rivals that from Japan, stibiconite, scheelite, hematite with lightly tinted quartz, cinnabar, hemimorphite, and a range of other colorful minerals.’
Mid 19th century: from Latin stibium black antimony + -ine + -ite.