1 Astrology
2.1 Origin
Australia
Kenya, Southern and central Africa
2.2 Color
Red
Green, Brown, Yellow, Red
2.4 Streak
White, Colorless
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2.6 For which Rashi?
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2.8 Planet
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2.10 Element of Planets
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2.12 How to Wear?
2.13.1 Finger
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2.13.3 Ring Metal
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2.14 Energy
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2.16 Deities
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2.18 Not to wear with
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2.20 Powers
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2.22 Birthstone
2.23.1 Planetary
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2.23.4 Talisman
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4 Physical Properties
4.2 Tenacity
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4.3 Solubility
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4.5 Durability
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4.7 Specific Gravity
4.10 Fracture
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
Gemstones (2009)
4.12 Cleavage
Perfect {010} imperfect {100}
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4.14 Mohs Hardness
4.16 Chemical Composition
Ca2Al3(SiO4)3(OH)
Al 2SiO 5Arthur Thomas , Gemstones (2009) More from other references
6 Optical Properties
6.2 Luster
6.3 Pleochroism
Present
Blue stones strong trichroism: colorless/pale blue (greenish or violet)-blue dark blueHerve Nicolas Lazzarelli
6.6 Dispersion
6.8 Transparency
Opaque, Translucent, Opaque . May be translucent in thin backlit sections.
Transparent
6.10 Refractive Index
6.12 Optic Character
6.14 Crystal System
Orthorhombic
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6.16 Birefringence
0.006-0.0180.012-0.033
0
0.296
6.18 Clarity
OpaqueHerve Nicolas Lazzarelli
Transparent
8 Benefits
8.1 Physical
8.1.1 Neurological
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8.1.3 Cardiovascular
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8.1.5 Respiratory
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8.1.7 Reproductive
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8.1.9 Digestive
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8.3 Psychology
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8.5 Healing
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8.7 Qualities Associated
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