Wolframite
ID: 70
Wolframite
Chemical Formula
(Fe,Mn)WO₄
Hardness (Mohs)
4 - 4.5
Crystal System
Monoclinic
Streak
Brown to black
Luster
Submetallic to resinous
Diaphaneity
Translucent to Opaque
Color
Black to grey or brown
Crystal Habit / Mode of Occurrence
Lamellar and prismatic habit.
Fun Facts
Iron manganese tungstate. Fracture is uneven. Wolframite is defined as the principal ore mineral of tungsten or the chief ore of tungsten, commonly found in association with tin ore in granite rocks.