1 Astrology
1.1 Origin
1.2 Color
Colorless, Colorless, Violet, White
Blue, Red, Yellow, Colorless, Blue, Colorless, Green, Yellow, White, Blue, Colorless, Green, Yellow, White
1.3 Streak
1.4 For which Rashi?
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1.5 Planet
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1.7 Element of Planets
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1.8 How to Wear?
1.9.1 Finger
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1.9.2 Ring Metal
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1.10 Energy
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1.11 Deities
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1.12 Not to wear with
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1.13 Powers
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1.14 Birthstone
1.14.1 Planetary
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1.14.2 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
2.8 Fracture
Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
2.9 Cleavage
Perfect on {100}
Poor/indistinct on {1120} and {1011}
2.10 Mohs Hardness
3.5 Chemical Composition
Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.
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
4 Optical Properties
4.1 Luster
4.2 Pleochroism
4.3 Dispersion
4.4 Transparency
Transparent, Translucent
Transparent
4.5 Refractive Index
1.461-1.4851.614-1.666
1
3.25
4.6 Optic Character
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4.7 Crystal System
4.8 Birefringence
4.9 Clarity
5 Benefits
5.1 Physical
5.1.1 Neurological
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5.1.2 Cardiovascular
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5.1.3 Respiratory
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5.1.4 Reproductive
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5.1.5 Digestive
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5.2 Psychology
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5.3 Healing
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5.4 Qualities Associated
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