Skutterudite
ID: 32
Skutterudite
Chemical Formula
(Co,Ni,Fe)As₃
Hardness (Mohs)
5.5 - 6
Crystal System
Isometric
Streak
Black
Luster
Metallic
Diaphaneity
Opaque
Color
Tin-white to lead-gray, sometimes iridescent tarnish
Crystal Habit / Mode of Occurrence
Isometric - Diploidal; commonly cubic or octahedral crystals, often modified by other forms; also massive, granular.
Fun Facts
Skutterudite belongs to a group of arsenide minerals with complex compositions and shares a crystal structure with pyrite. Common Uses: Ore of cobalt and nickel; collector's mineral.