Identity
Formula
Mg₅(Al,Cr)(AlSi₃O₁₀)(OH)₈
Class
Silicates
Subclass
Phyllosilicates
Crystal System
Monoclinic
Hardness
2-2.5
Color
Magenta, purple, rose red to crimson
Lustre
Pearly to greasy
Specific Gravity
2.60 - 3.02
Cleavage
Perfect on {001}
Streak
Greenish white to white
