Mineral Species: Stibnite
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.
Description: A very unusual specimen of Stibnite where crystals fo the mineral are partially ocluded by botryoidal Quartz. Both are very lustrous, especially the Quartz which has a very pronounced glassy luster. The surface is speckled by tiny Stibnite crystals which produce a myriad of bright reflections. A superb display specimen.
Location: Xikuangshan Mine, Hunan, China.
