Tremolite
Chemical Formula	Ca2Mg5Si8O22(OH)2
Species	Silicates
Crystal System	Monoclinic
Mohs Scale	5-6
Specific Gravity	2.99-3.03
Color	White, gray, lavender to pink, light green, light yellow
Streak	White
Luster	Vitreous, Silky
Refractive Index	n = 1.599 - 1.612 n = 1.613 - 1.626 n = 1.625 - 1.637
Diaphaneity	Transparent, Translucent
Cleavage	Perfecton
Crystal Habit：Elongated prismatic, or flattened crystals; also as fibrous, granular or columnar aggregates
Geological Setting：Contact metamorphism of Ca-Mg siliceous sediments, regional greenschist metamorphism of ultramafic rocks or magnesium carbonate rocks.