The commercial ore of this metal is the sulphide known as stibnite, or gray antimony.
Of these the only one in sufficient abundance for smelting is the common sulphide known as grey antimony or stibnite.
The stibnite is liquated out at a low heat and drips from the upper to the lower pot.
stibnite is found in a variety of associations and is present in small quantities in many types of deposits.
It crystallizes in the orthorhombic system and is isomorphous with stibnite (Sb2S3), which it closely resembles in appearance.
The antimony sulphide, stibnite, is the source of most of the world's production of this metal.
Although antimony occurs in many minerals, the only commercial source is the sulphide, stibnite.