1 Astrology
1.1 Origin
Southern and central Africa
Madagascar
1.2 Color
Red, Blue, Green, Reddish, Brown
Green
1.3 Streak
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
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1.9 Deities
Not Available
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1.10 Not to wear with
Not Available
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1.11 Powers
Not Available
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1.12 Birthstone
1.12.1 Planetary
Not Available
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1.12.2 Talisman
Not Available
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2 Physical Properties
2.1 Tenacity
Not Available
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2.2 Solubility
Not Available
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2.3 Durability
Not Available
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2.4 Specific Gravity
3.79-3.942.85-3.00
1
7.18
2.5 Fracture
Lamellar, Splintery
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
2.6 Cleavage
{100} Good, {001} Good, {010} Poor
Perfect
2.7 Mohs Hardness
2.8 Chemical Composition
Not Available
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
3 Optical Properties
3.1 Luster
3.2 Pleochroism
3.3 Dispersion
3.4 Transparency
TranslucentAnthony et al, Handbook of mineralogy (2001)
Gemmological Tables (2004) More from other references
3.5 Refractive Index
1.670-1.7341.578-1.639
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
Not Available
Orthorhombic
3.8 Birefringence
Not Available0.037-0.039
0
0.296
3.9 Clarity
TranslucentAnthony et al
Gemmological Tables (2004) More from other references
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
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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
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