Citrine
Chemical Formula	SiO2
Species	Oxides & Hydroxides
Crystal System	Trigonal
Mohs Scale	7
Specific Gravity	2.59-2.65
Color	From colorless to black, through various colors
Streak	White
Luster	Vitreous
Refractive Index	nω = 1.543–1.545nε = 1.552–1.554
Diaphaneity	Transparent to nearly opaque
Cleavage	Indistinct
Fracture	Conchoidal
Crystal Habit：6-sided prism ending in 6-sided pyramid (typical), drusy, fine-grained to microcrystalline, massive