Anthophyllite
Chemical Formula	(Mg,Fe)7Si8O22(OH)2
Species	Silicates
Crystal System	Orthorhombic
Mohs Scale	5-6
Specific Gravity	2.85-3.2
Color	Gray to green, brown, and beige
Streak	White to gray
Luster	Vitreous, Pearly
Refractive Index	n = 1.598 - 1.674 n = 1.605 - 1.685 n = 1.615 - 1.697
Diaphaneity	Transparent, Translucent
Cleavage	PerfectPerfect on , imperfect on ,
Fracture	Conchoidal
Crystal Habit：Rarely as distinct crystals. Commonly lamellar or fibrous.