(Mg,Fe)SiO3Orthorhombic
Hypersthene
(Mg,Fe)SiO3
SilicatesChemical Formula(Mg,Fe)SiO3
Crystal SystemOrthorhombic
Mohs Hardness5.5
Specific Gravity3.45
ColorGreen, brown, black
LusterVitreous to pearly
StreakGrayish white
CleavageTwo directions
FractureUneven
Occurrence
Found in igneous and metamorphic rocks. Shows bronzy schiller effect.