1 Astrology
1.1 Origin
Southern and central Africa
Southern and central Africa
1.2 Color
Blue, Grey
Greenish, Blue, Colorless, Green, Yellow
1.3 Streak
Not Available
Greenish, gray
1.4 For which Rashi?
Not Available
Not Available
1.5 Planet
Not Available
Not Available
1.6 Element of Planets
Not Available
Not Available
1.7 How to Wear?
1.7.1 Finger
Not Available
Not Available
1.7.2 Ring Metal
Not Available
Not Available
1.8 Energy
Not Available
Not Available
1.9 Deities
Not Available
Not Available
1.10 Not to wear with
Not Available
Not Available
1.11 Powers
Not Available
Not Available
1.12 Birthstone
1.12.1 Planetary
Not Available
Not Available
1.12.2 Talisman
Not Available
Not Available
2 Physical Properties
2.1 Tenacity
Not Available
Not Available
2.2 Solubility
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
2.58-2.643.17-3.24
1
7.18
2.5 Fracture
Gemstones of the world (2001)
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
2.6 Cleavage
Not Available
(0001) indistinct
2.7 Mohs Hardness
2.8 Chemical Composition
SiO 2Walter Schumann , Gemstones of the world (2001)
SiCArthur Thomas , Gemstones (2009)
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Not Available
NilArthur Thomas
3.3 Dispersion
3.4 Transparency
Gemstones of the world (2001)
Gemmological Tables (2004) More from other references
3.5 Refractive Index
1.534-1.5402.648-2.691
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
Not Available
6H polytype
3.8 Birefringence
Not Available0.043
0
0.296
3.9 Clarity
Gemstones of the world (2001)
TransparentUlrich Henn and Claudio C. Milisenda
4 Benefits
4.1 Physical
4.1.1 Neurological
Not Available
Not Available
4.1.2 Cardiovascular
Not Available
Not Available
4.1.3 Respiratory
Not Available
Not Available
4.1.4 Reproductive
Not Available
Not Available
4.1.5 Digestive
Not Available
Not Available
4.2 Psychology
Not Available
Not Available
4.3 Healing
Not Available
Not Available
4.4 Qualities Associated
Not Available
Not Available