1 Astrology
1.1 Origin
Southern and central Africa
Southern and central Africa
1.2 Color
Yellow, Blue, Colorless, Yellow, White
Red, Yellow, orange
1.3 Streak
1.4 For which Rashi?
Not Available
Not Available
1.5 Planet
Not Available
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1.6 Element of Planets
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1.7 How to Wear?
1.7.1 Finger
Not Available
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1.7.2 Ring Metal
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1.8 Energy
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1.9 Deities
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1.10 Not to wear with
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1.11 Powers
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1.12 Birthstone
1.12.1 Planetary
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1.12.2 Talisman
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2 Physical Properties
2.1 Tenacity
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2.2 Solubility
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2.3 Durability
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2.4 Specific Gravity
2.5 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
(e.g. graphite).
2.6 Cleavage
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.
AsSMichael OâDonoghue , Gems, Sixth Edition (2006)
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Colorless
Nearly colorless to pale golden yellowAnthony et al
3.3 Dispersion
3.4 Transparency
Gemmological Tables (2004) More from other references
Gems
3.5 Refractive Index
1.638-1.6502.538-2.704
1
3.25
3.6 Optic Character
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3.7 Crystal System
3.8 Birefringence
3.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Gems
4 Benefits
4.1 Physical
4.1.1 Neurological
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4.1.2 Cardiovascular
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4.1.3 Respiratory
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4.1.4 Reproductive
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4.1.5 Digestive
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4.2 Psychology
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4.3 Healing
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4.4 Qualities Associated
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