1 Astrology
1.1 Origin
Southern and central Africa
Southern and central Africa
1.2 Color
Yellow, Blue, Colorless, Yellow, White
Yellow, Green, Blue, Violet
1.3 Streak
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
Not Available
Not Available
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
3.28-3.313.90-4.05
1
7.18
2.5 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Not Available
2.6 Cleavage
None observed
Not Available
2.7 Mohs Hardness
6.5-7.5Not Available
2
10
2.8 Chemical Composition
Al 6B 5O 15(F,OH) 3Ulrich Henn and Claudio C.
Al 2O 3Ulrich Henn and Claudio C.
3 Optical Properties
3.1 Luster
3.2 Pleochroism
3.3 Dispersion
3.4 Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent
3.5 Refractive Index
1.638-1.6501.758-1.780
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
3.8 Birefringence
0.01300.007-0.010
0
0.296
3.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent
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