Name: Stibnite

Locality: Rueifang, Taipei County, Taiwan

Size & weight: 14

Chemical Class: Sulphide & Sulfate

Chemical Formula: Sb₂S₃

Crystal System: Orthorhombic system

Hardness: 2

Fracture: Uneven

Cleavage: Perfect

Streak: leaden

Common Appearance: Prismatic, columnar, granular, dense and compact, and bladed

Luster: Metallic luster

Color: Lead grey

Specific Gravity: 4.52-4.6

Stibnite is formed of antimony (Sb) and sulphur (S), and occurs in low-temperature hydrothermal ore deposits, hot spring deposits and volcanic condensates. Antimony is an important metal widely used in military as well as daily civilian applications. Stibnite is an important raw material in extraction of antimony.