1 Astrology
1.1 Origin
Canada, Madagascar, Southern and central Africa, Sri Lanka, USA
Brazil
1.2 Color
Violet, Blue
Yellow, White, Brown, Brownish, Black
1.3 Streak
Not Available
Brown, Yellow, White
1.4 For which Rashi?
Not Available
Not Available
1.5 Planet
Not Available
Not Available
1.6 Element of Planets
Not Available
Not Available
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
Not Available
Not Available
1.9 Deities
Not Available
Not Available
1.10 Not to wear with
Not Available
Not Available
1.11 Powers
Not Available
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1.12 Birthstone
1.12.1 Planetary
Not Available
Not Available
1.12.2 Talisman
Not Available
Not Available
2 Physical Properties
2.1 Tenacity
Not Available
Not Available
2.2 Solubility
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
2.56-2.663.06-3.25
1
7.18
2.5 Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Sub-Conchoidal, ConchoidalArthur Thomas, Conchoidal, Uneven
2.6 Cleavage
Not Available
Poor/indistinct on {100}
2.7 Mohs Hardness
2.8 Chemical Composition
Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
3 Optical Properties
3.1 Luster
Vitreous
Vitreous, Resinous
3.2 Pleochroism
Strong trichroism: colorless to yellowish
visible
3.3 Dispersion
3.4 Transparency
3.5 Refractive Index
1.542-1.5781.639-1.672
1
3.25
3.6 Optic Character
3.7 Crystal System
Not Available
Orthorhombic
3.8 Birefringence
0.008-0.0120.027-0.042
0
0.296
3.9 Clarity
4 Benefits
4.1 Physical
4.1.1 Neurological
Not Available
Not Available
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