1 Astrology
1.1 Origin
Australia
Southern and central Africa, Sixth Edition (2006)
1.2 Color
Colorless, White, Brownish, Yellow, Brown
Blue, Green, Blue, Brown
1.3 Streak
1.4 For which Rashi?
1.5 Planet
1.6 Element of Planets
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
1.10 Not to wear with
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1.11 Powers
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
Not Available
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2.4 Specific Gravity
Not Available2.00-2.45
1
7.18
2.5 Fracture
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Sub-Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
2.6 Cleavage
2.7 Mohs Hardness
2.8 Chemical Composition
Al 4(Ta,Nb) 3(O,OH,F) 14Ulrich Henn and Claudio C.
Cu2H2Si2O5(OH)4
3 Optical Properties
3.1 Luster
Adamantine
Vitreous, Greasy
3.2 Pleochroism
NilArthur Thomas
AbsentWalter Schumann
3.3 Dispersion
3.4 Transparency
Gemmological Tables (2004) More from other references
Opaque
3.5 Refractive Index
1.994-2.0401.460-1.570
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
3.8 Birefringence
3.9 Clarity
Gemmological Tables (2004) More from other references
Gemmological Tables (2004) More from other references
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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