1 Astrology
1.1 Origin
Southern and central Africa
Southern and central Africa, Sixth Edition (2006)
1.2 Color
Violet, Blue, Red, Yellow, Brown, gray
Blue, Green, Blue, Brown
1.3 Streak
White, None
White, Blue, Green
1.4 For which Rashi?
1.5 Planet
1.6 Element of Planets
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
1.9 Deities
1.10 Not to wear with
Not Available
Not Available
1.11 Powers
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
2.2 Solubility
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
3.90-4.052.00-2.45
1
7.18
2.5 Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Sub-Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
2.6 Cleavage
None – parting in 3 directions
none
2.7 Mohs Hardness
2.8 Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
Cu2H2Si2O5(OH)4
3 Optical Properties
3.1 Luster
Adamantine, Vitreous
Vitreous, Greasy
3.2 Pleochroism
None
AbsentWalter Schumann
3.3 Dispersion
3.4 Transparency
Transparent, Translucent
Opaque
3.5 Refractive Index
1.758-1.7801.460-1.570
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
3.8 Birefringence
0.007-0.0100.023-0.050
0
0.296
3.9 Clarity
Gemmological Tables (2004) More from other references
Gemmological Tables (2004) More from other references
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