1 Astrology
1.1 Origin
Mexico, USA, Spain
Southern and central Africa
1.2 Color
Green, Brown, Yellow, Red, Black
Brown, Black, Blue
1.3 Streak
Brownish, White
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1.4 For which Rashi?
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1.5 Planet
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1.6 Element of Planets
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1.7 How to Wear?
1.7.1 Finger
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1.7.2 Ring Metal
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1.8 Energy
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1.9 Deities
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1.11 Not to wear with
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1.12 Powers
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2.2 Birthstone
2.2.2 Planetary
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2.2.4 Talisman
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3 Physical Properties
3.1 Tenacity
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3.3 Solubility
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3.5 Durability
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3.7 Specific Gravity
3.8 Fracture
UnevenWalter Schumann, Gemstones of the world (2001) More from other references, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Uneven
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)
3.9 Cleavage
{110} Perfect, {110} Perfect, {110} Perfect
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3.10 Mohs Hardness
3.11 Chemical Composition
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiO 2Ulrich Henn and Claudio C.
4 Optical Properties
4.1 Luster
4.2 Pleochroism
AbsentWalter Schumann
Definite: brown reddish-brownWalter Schumann
4.3 Dispersion
4.4 Transparency
Transparent, Translucent
Transparent, Translucent
4.5 Refractive Index
2.368-2.3711.544-1.553
1
3.25
4.6 Optic Character
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4.7 Crystal System
4.8 Birefringence
Not Available0.009
0
0.296
4.9 Clarity
5 Benefits
5.1 Physical
5.1.1 Neurological
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5.1.2 Cardiovascular
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5.1.3 Respiratory
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5.1.4 Reproductive
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5.1.5 Digestive
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5.2 Psychology
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5.3 Healing
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5.4 Qualities Associated
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