1 Astrology
1.1 Origin
Southern and central Africa
Sri Lanka, Burma, USA, Russia
1.2 Color
Colorless, White, Blue, Yellow, Grey, Brown, Colorless, White, Blue, Yellow, Grey, Brown
Yellow, Brown, pink, Colorless
1.3 Streak
1.4 For which Rashi?
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1.5 Planet
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1.6 Element of Planets
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1.7 How to Wear?
1.7.1 Finger
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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
2.2 Solubility
2.3 Durability
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2.4 Specific Gravity
2.5 Fracture
Irregular/uneven
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
2.6 Cleavage
Perfect cleavage parallel to base and prism faces: {001} Perfect, {210} Perfect, {010} Imperfect
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2.7 Mohs Hardness
2.8 Chemical Composition
Not Available
MgAlBO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
3 Optical Properties
3.1 Luster
Vitreous, Pearly
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3.2 Pleochroism
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Trichroism: green light brown dark brownHerve Nicolas Lazzarelli
3.3 Dispersion
3.4 Transparency
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Gemmological Tables (2004) More from other references
3.5 Refractive Index
1.634-1.6371.665-1.712
1
3.25
3.6 Optic Character
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3.7 Crystal System
Orthorhombic
Orthorhombic
3.8 Birefringence
Not Available0.036-0.042
0
0.296
3.9 Clarity
Not Available
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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