Crystal Malachite

Chemical Formula	Cu2CO3(OH)2
Color	Green, Banded
Hardness	3.5 - 4
Crystal System	Monoclinic
Refractive Index	1.65 - 1.91
SG	3.9 - 4.0
Transparency	Opaque
Double Refraction	-.025
Luster	Silky
Cleavage	1,1 - basal. Not usually discernible because crystals are tiny.
Mineral Class	Malachite