Crystal Peridot

Chemical Formula	(Mg,Fe)2SiO4
Color	Green, Yellow
Hardness	6.5 - 7
Crystal System	Orthorhombic
Refractive Index	2.63 - 2.65
SG	1.54 - 1.55
Transparency	Transparent
Double Refraction	.009
Luster	Vitreous
Cleavage	2,1 ; 3,1
Mineral Class	Olivine