Mineral - Penroseite
Penroseite
Chemical Properties
Mineral Class
Sulfides and sulfosalts
Toxicity
middle
Formula
(Ni,Co,Cu)Se₂
Unit Cell
Physical Properties
Hardness
2.5 - 3
Streak
black
Density
Very Heavy (>6)
Cleavage
Fracture
Tenacity
Optical Properties
Color
gray
Birefringence
Luster
Metallic
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
isometric
Point Group
Space Group
Habit
coarse, massive, acicular, radial
Formation
hydrothermal
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Penroseite