Mineral - Tephroite
Tephroite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Mn₂SiO₄
Unit Cell
Physical Properties
Hardness
6
Streak
whitegraygray white
Density
Cleavage
Fracture
Tenacity
Optical Properties
Color
browngrayred
Birefringence
Luster
Vitreous,
Greasy
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
Space Group
Habit
massive, prismatic
Formation
Metasomatose
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Tephroite