Crystal Amazonite

Chemical Formula	KAlSi3O8
Color	Blue, Green, Purple, Gray, Multicolored
Hardness	6 - 6.5
Crystal System	Triclinic
Refractive Index	1.52 - 1.53
SG	2.56 - 2.58
Transparency	Translucent to opaque
Double Refraction	-.008
Luster	Vitreous
Cleavage	2,1 - basal ; 2,1 - prismatic ; 3,1 - pinacoidal
Mineral Class	Microcline