Mineral - Tetradymite
Tetradymite
Chemical Properties
Mineral Class
Sulfides and sulfosalts
Toxicity
none
Formula
Bi₂Te₂S
Unit Cell
Physical Properties
Hardness
1.5 - 2
Streak
gray
Density
Very Heavy (>6)
Cleavage
Fracture
Tenacity
Optical Properties
Color
graybronze
Birefringence
Luster
Metallic
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
trigonal
Point Group
Space Group
Habit
massive, pyramidal, columnar
Formation
Metasomatose, hydrothermal
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Tetradymite