Origin
Russia
Southern and central Africa
Color
Colorless, Brownish
White, Colorless, Blue, Red, Green, Yellow, Violet
Solubility
Nearly insoluble in HCl and HNO3
-
Specific Gravity
2.97
2.58-2.63
Fracture
Conchoidal
Conchoidal
Cleavage
Distinct on {010}
None
Chemical Composition
-
SiO 2Ulrich Henn and Claudio C.
Luster
Greasy, Vitreous, Pearly
Waxy
Pleochroism
(x): colorless. (y): colorless. (z): colorless.
-
Transparency
-
Translucent
Refractive Index
1.607
1.535-1.539
Crystal System
monoclinic
-
Birefringence
-9999
0.008-0.010
Healing
Physical healing
Emotional healing
Qualities Associated
Protection
Protection