(Fe,Mn)WO4Monoclinic
Wolframite
(Fe,Mn)WO4
TungstatesChemical Formula(Fe,Mn)WO4
Crystal SystemMonoclinic
Mohs Hardness5
Specific Gravity7.5
ColorBrownish black
LusterSubmetallic to resinous
StreakBrownish
CleavageOne direction
FractureUneven
Occurrence
Primary ore of tungsten. Found in pegmatites and hydrothermal veins.