2 Astrology
2.1 Origin
USA
Southern and central Africa
2.3 Color
2.5 Streak
2.7 For which Rashi?
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2.9 Planet
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2.11 Element of Planets
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2.13 How to Wear?
2.13.1 Finger
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2.14.2 Ring Metal
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2.15 Energy
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2.17 Deities
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2.19 Not to wear with
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2.21 Powers
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2.23 Birthstone
2.23.1 Planetary
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2.24.2 Talisman
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3 Physical Properties
3.1 Tenacity
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4.2 Solubility
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4.4 Durability
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4.6 Specific Gravity
4.9 Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Metallic
Brittle, Metallic
4.12 Cleavage
Distinct on [010] and [100] poor on [101]
Imperfect in one direction
4.13 Mohs Hardness
5.3 Chemical Composition
PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
6 Optical Properties
6.2 Luster
6.3 Pleochroism
6.4 Dispersion
6.7 Transparency
OpaqueAnthony et al, Opaque, Transparent
Transparent
6.8 Refractive Index
1.760-1.7741.607-1.672
1
3.25
6.12 Optic Character
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6.13 Crystal System
6.14 Birefringence
7.2 Clarity
OpaqueAnthony et al
Transparent
8 Benefits
8.1 Physical
8.2.1 Neurological
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8.3.1 Cardiovascular
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8.4.1 Respiratory
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8.4.2 Reproductive
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8.4.3 Digestive
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8.5 Psychology
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8.6 Healing
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8.7 Qualities Associated
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