1 Astrology
1.1 Origin
Let us know how we can update this page, (Click for more details), Not Available, Southern and central Africa
Southern and central Africa
1.2 Color
Red
Yellow, Blue, Colorless, Yellow, White
1.3 Streak
1.4 For which Rashi?
1.5 Planet
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
1.9 Deities
Black Madonna, Isis
Not Available
1.10 Not to wear with
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1.11 Powers
Courage, Wealth
Not Available
1.12 Birthstone
1.12.1 Planetary
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1.12.2 Talisman
Not Available
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2 Physical Properties
2.1 Tenacity
Not Available
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2.2 Solubility
Not Available
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2.3 Durability
Not Available
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2.4 Specific Gravity
2.63-2.653.28-3.31
1
7.18
2.5 Fracture
Not Available
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
2.6 Cleavage
Indiscernible
None observed
2.7 Mohs Hardness
2.8 Chemical Composition
SiO2
Al 6B 5O 15(F,OH) 3Ulrich Henn and Claudio C.
3 Optical Properties
3.1 Luster
3.2 Pleochroism
3.3 Dispersion
3.4 Transparency
Opaque
Gemmological Tables (2004) More from other references
3.5 Refractive Index
1.54-1.551.638-1.650
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
3.8 Birefringence
Not Available0.0130
0
0.296
3.9 Clarity
Opaque
TransparentUlrich Henn and Claudio C. Milisenda
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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