Antimony sulphide black is black powder.Antimony trisulfide occurs in nature primarily as the mineral, stibnite, which consists of two parallel Sb4S6 chains linked together.
Antimony sulphide black is found in nature as the crystalline mineral stibnite and the amorphous red mineral (actually a mineraloid) metastibnite.It is manufactured for use in safety matches, military ammunition, explosives and fireworks.