1 Astrology
1.1 Origin
1.2 Color
Green, Colorless, Greenish, Yellow, Green
Blue, Blue, Black
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
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2.3 Durability
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2.4 Specific Gravity
2.5 Fracture
Conchoidal, Gems
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
2.6 Cleavage
(010) Distinct to good
Perfect on {0001}
2.7 Mohs Hardness
2.8 Chemical Composition
NaAl 3(PO 4) 2(OH) 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Very weakWalter Schumann
Marked
3.3 Dispersion
3.4 Transparency
Gemmological Tables (2004) More from other references
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references
3.5 Refractive Index
1.602-1.6251.45-2.62
1
3.25
3.6 Optic Character
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3.7 Crystal System
3.8 Birefringence
0.019-0.021Not Available
0
0.296
3.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
OpaqueAnthony et al
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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