1 Astrology
1.1 Origin
1.2 Color
Yellow, Violet, Green, Brown, White, gray, Greenish
Brownish, Black, Reddish, Brown, Blue
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
Not Available
1.7.2 Ring Metal
Not Available
Not Available
1.8 Energy
Not Available
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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
Not Available
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2 Physical Properties
2.1 Tenacity
2.2 Solubility
Not Available
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2.3 Durability
Not Available
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2.4 Specific Gravity
2.5 Fracture
Uneven
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
2.6 Cleavage
Perfect basal {001}
{0001} good, {10 1 0} parting
2.7 Mohs Hardness
2.8 Chemical Composition
Not Available
(Ca,Ce)(Al,Ti,Mg)12O19
3 Optical Properties
3.1 Luster
Pearly, Vitreous
Vitreous
3.2 Pleochroism
Distinct
O = brownish gray; E = gray
3.3 Dispersion
3.4 Transparency
Not Available
Handbook of mineralogy (2001)
3.5 Refractive Index
1.565-1.6251.79-1.807
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
3.8 Birefringence
0.040-0.050Not Available
0
0.296
3.9 Clarity
Not Available
Handbook of mineralogy (2001)
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
Not Available
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