Chemical Formula: Sb2S3

Chemical Name: Antimony Trisulfide

Mineral Class: Sulphide

Mineral Notes:  Stibnite is an important ore of Antimony. It is deposited from hot solutions, often with Arsenic minerals and Cinnabar, an ore of Mercury. Stibnite has the interesting property of having gliding planes. Thus many crystals can be bent, or will bend under pressure, without fracturing. The atoms will glide a definite distance in the basal plane, and then stop.