1 Astrology
1.3 Origin
1.6 Color
Blue, Red, Yellow, Colorless, Blue, Colorless, Green, Yellow, White, Blue, Colorless, Green, Yellow, White
Blue, Green, Colorless, White
1.9 Streak
1.1 For which Rashi?
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1.5 Planet
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1.8 Element of Planets
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1.10 Energy
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1.14 How to Wear?
1.14.1 Finger
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1.17.1 Ring Metal
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1.2 Deities
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1.6 Not to wear with
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1.9 Powers
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1.12 Birthstone
1.12.1 Planetary
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3.4.1 Talisman
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4 Physical Properties
4.1 Tenacity
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4.7 Solubility
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4.10 Durability
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5.2 Specific Gravity
6.8 Fracture
Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
6.10 Cleavage
Poor/indistinct on {1120} and {1011}
{001} Perfect
6.13 Mohs Hardness
7.4 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
NaAl 3(PO 4) 2(OH) 4 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
8 Optical Properties
8.1 Luster
9.2 Pleochroism
10.2 Dispersion
11.7 Transparency
11.9 Refractive Index
1.614-1.6661.590-1.599
1
3.25
11.22 Optic Character
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11.24 Crystal System
11.26 Birefringence
13.4 Clarity
14 Benefits
14.1 Physical
14.1.1 Neurological
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14.1.2 Cardiovascular
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14.1.3 Respiratory
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15.1.2 Reproductive
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15.1.3 Digestive
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15.2 Psychology
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15.3 Healing
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15.4 Qualities Associated
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