1 Astrology
1.1 Origin
Southern and central Africa, Sixth Edition (2006)
Canada, USA, Tanzania, Norway
1.2 Color
Blue, Green, Blue, Brown
Red, Yellow, Brown, Yellow, Red, pink, Green
1.3 Streak
White, Blue, Green
Not Available
1.4 For which Rashi?
1.5 Planet
1.6 Element of Planets
1.7 How to Wear?
1.7.1 Finger
Not Available
Not Available
1.7.2 Ring Metal
Not Available
Not Available
1.8 Energy
1.9 Deities
1.10 Not to wear with
Not Available
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1.11 Powers
1.12 Birthstone
1.12.1 Planetary
Not Available
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1.12.2 Talisman
Not Available
Not Available
2 Physical Properties
2.1 Tenacity
2.2 Solubility
Not Available
Not Available
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
2.00-2.452.62-2.65
1
7.18
2.5 Fracture
Sub-Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Gemstones of the world (2001)
2.6 Cleavage
2.7 Mohs Hardness
2.8 Chemical Composition
Cu2H2Si2O5(OH)4
Microcline: KAlSi3O8 Oligoclase: (Na,Ca)Al1-2Si3-2O8
3 Optical Properties
3.1 Luster
Vitreous, Greasy
Vitreous
3.2 Pleochroism
AbsentWalter Schumann
Weak or absentWalter Schumann
3.3 Dispersion
3.4 Transparency
Opaque
Transparent, Translucent, Transparent to translucent
3.5 Refractive Index
1.460-1.5701.53-1.55
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
3.8 Birefringence
0.023-0.0500.007-0.010
0
0.296
3.9 Clarity
Gemmological Tables (2004) More from other references
Transparent to translucent
4 Benefits
4.1 Physical
4.1.1 Neurological
Not Available
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4.1.2 Cardiovascular
Not Available
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4.1.3 Respiratory
Not Available
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4.1.4 Reproductive
Not Available
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4.1.5 Digestive
Not Available
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4.2 Psychology
Not Available
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4.3 Healing
Not Available
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4.4 Qualities Associated
Not Available
Not Available