1 Astrology
1.1 Origin
Not Available
Not Available, Southern and central Africa
1.2 Color
Green, Grey, Blue, Yellow, Colorless, Violet, Red
Violet, Black
1.3 Streak
Greenish, White
gray, White, gray, 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
Not Available
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
Not Available
Not Available
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
2.5 Fracture
Sub-Conchoidal, Splintery
Handbook of mineralogy (2001)
2.6 Cleavage
{201} Imperfect, {100} Poor, {001} Poor
None
2.7 Mohs Hardness
2.8 Chemical Composition
Not Available
Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
3 Optical Properties
3.1 Luster
Sub-Adamantine, Vitreous, Resinous
Vitreous
3.2 Pleochroism
Weak
Strong: pale lavender dark blueAnthony et al
3.3 Dispersion
3.4 Transparency
Not Available
TranslucentAnthony et al, Translucent
3.5 Refractive Index
Not AvailableNot Available
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
Orthorhombic
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
3.8 Birefringence
Not AvailableNot Available
0
0.296
3.9 Clarity
Not Available
TranslucentAnthony et al
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
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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
Not Available
Not Available