1 Astrology
1.1 Origin
Southern and central Africa
Southern and central Africa
1.2 Color
Yellow, Blue, Colorless, Yellow, White
Blue, Grey
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
3.28-3.312.58-2.64
1
7.18
2.5 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Gemstones of the world (2001)
2.6 Cleavage
None observed
Not Available
2.7 Mohs Hardness
2.8 Chemical Composition
Al 6B 5O 15(F,OH) 3Ulrich Henn and Claudio C.
SiO 2Walter Schumann , Gemstones of the world (2001)
3 Optical Properties
3.1 Luster
3.2 Pleochroism
3.3 Dispersion
3.4 Transparency
Gemmological Tables (2004) More from other references
Gemstones of the world (2001)
3.5 Refractive Index
1.638-1.6501.534-1.540
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
3.8 Birefringence
0.0130Not Available
0
0.296
3.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Gemstones of the world (2001)
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
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4.4 Qualities Associated
Not Available
Not Available