1 Astrology
1.1 Origin
1.2 Color
Blue, gray, Black, Blue
Yellow, Red, Green, Colorless, orange
1.3 Streak
Blue
Yellow, yellowish orange
1.4 For which Rashi?
Not Available
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1.5 Planet
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1.6 Element of Planets
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1.7 How to Wear?
1.7.1 Finger
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1.7.2 Ring Metal
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1.8 Energy
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1.9 Deities
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1.10 Not to wear with
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1.11 Powers
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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
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2.4 Specific Gravity
2.5 Fracture
Conchoidal, Brittle, Conchoidal
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
2.6 Cleavage
Good on [110] and on [001]
On {10 1 0}, perfect; parting on {000 1 }
2.7 Mohs Hardness
2.8 Chemical Composition
[ ]Na2(Mg3Al2)Si8O22(OH)2
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
3 Optical Properties
3.1 Luster
Vitreous, Pearly
Subadamantine, Resinous
3.2 Pleochroism
3.3 Dispersion
3.4 Transparency
Not Available
TransparentRobert C. Kammerling, The Journal of Gemmology (1995) More from other references
3.5 Refractive Index
1.606-1.6372.013-2.029
1
3.25
3.6 Optic Character
Not Available
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3.7 Crystal System
3.8 Birefringence
Not Available0.016
0
0.296
3.9 Clarity
Not Available
TransparentRobert C. Kammerling
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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