stibnite
Stib"nite, n. (Min.) Defn: 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.
Stib"nite, n. (Min.) Defn: 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.