1 Astrology
1.2 Origin
1.4 Color
Blue, Red, Yellow, Colorless, Blue, Colorless, Green, Yellow, White, Blue, Colorless, Green, Yellow, White
Blue, Green, Greenish, Black
1.6 Streak
1.7 For which Rashi?
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1.9 Planet
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1.11 Element of Planets
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1.13 Energy
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1.1 How to Wear?
1.1.1 Finger
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1.2.1 Ring Metal
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1.3 Deities
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1.3 Not to wear with
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1.4 Powers
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1.6 Birthstone
1.6.1 Planetary
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1.3.1 Talisman
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2 Physical Properties
2.2 Tenacity
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2.6 Solubility
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2.10 Durability
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2.14 Specific Gravity
2.90-3.104.00-4.62
1
7.18
5.5 Fracture
Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Conchoidal, Uneven
5.6 Cleavage
Poor/indistinct on {1120} and {1011}
Indistinct parting on [111]
5.7 Mohs Hardness
5.14 Chemical Composition
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
6 Optical Properties
6.1 Luster
6.2 Pleochroism
6.3 Dispersion
8.4 Transparency
Transparent
Gemmological Tables (2004) More from other references
8.5 Refractive Index
1.614-1.6661.790-1.818
1
3.25
9.4 Optic Character
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9.5 Crystal System
9.6 Birefringence
0.014-0.032Not Available
0
0.296
10.2 Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
11 Benefits
11.1 Physical
11.1.2 Neurological
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11.2.1 Cardiovascular
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11.3.1 Respiratory
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11.4.1 Reproductive
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11.4.2 Digestive
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11.5 Psychology
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11.6 Healing
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11.7 Qualities Associated
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