Ca2Mg5Si8O22(OH)2Monoclinic
Tremolite
Ca2Mg5Si8O22(OH)2
SilicatesChemical FormulaCa2Mg5Si8O22(OH)2
Crystal SystemMonoclinic
Mohs Hardness5.5
Specific Gravity3
ColorWhite, gray, green
LusterVitreous to silky
StreakWhite
CleavageTwo directions at 56/124
FractureUneven
Occurrence
Found in metamorphic rocks. Amphibole mineral. One form of asbestos.