Crystal Carnelian

Chemical Formula	SiO2
Color	Red, Orange
Hardness	7
Crystal System	Hexagonal
Refractive Index	1.54 - 1.55
SG	2.63 - 2.65
Transparency	Transparent to nearly opaque
Double Refraction	.009
Luster	Vitreous
Cleavage	None
Mineral Class	Quartz (Chalcedony)