1 Astrology
1.1 Origin
1.2 Color
Blue, gray, Black, Blue
Colorless, White, Yellow, White, Greenish, gray, Brown, Colorless, Yellow
1.3 Streak
1.4 For which Rashi?
Not Available
Not Available
1.5 Planet
Not Available
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1.6 Element of Planets
Not Available
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1.7 How to Wear?
1.7.1 Finger
Not Available
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1.7.2 Ring Metal
Not Available
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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
Not Available
Very brittle
2.2 Solubility
2.3 Durability
Not Available
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2.4 Specific Gravity
2.5 Fracture
Conchoidal, Brittle, Conchoidal
Conchoidal, Brittle, Conchoidal
2.6 Cleavage
Good on [110] and on [001]
{010} perfect, {110} distinct, {100} in traces
2.7 Mohs Hardness
2.8 Chemical Composition
[ ]Na2(Mg3Al2)Si8O22(OH)2
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
3 Optical Properties
3.1 Luster
3.2 Pleochroism
3.3 Dispersion
3.4 Transparency
Not Available
Transparent
3.5 Refractive Index
1.606-1.6371.702-1.750
1
3.25
3.6 Optic Character
Not Available
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3.7 Crystal System
3.8 Birefringence
Not Available0.048
0
0.296
3.9 Clarity
Not Available
Transparent
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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