Origin
Southern and central Africa
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Color
Red, Blue, Green, Reddish, Brown
Blue, Green
Streak
White
Blue
For which Rashi?
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Planet
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Element of Planets
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Energy
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How to Wear?
Finger
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Ring Metal
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Deities
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Not to wear with
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Powers
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Birthstone
Planetary
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Talisman
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Tenacity
-
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Solubility
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Durability
-
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Specific Gravity
3.79-3.943.80-4.15
1
7.18
👆🏻
Fracture
Lamellar, Splintery
Uneven
Cleavage
{100} Good, {001} Good, {010} Poor
perfect along [010] and [100]
Mohs Hardness
43.5-4
2
10
👆🏻
Chemical Composition
FeAs
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Waxy
Silky
Pleochroism
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X = very pale blue; Y = pale blue; Z = deep blue
Dispersion
0.010.02
0.005
1
👆🏻
Transparency
TranslucentAnthony et al
Translucent
Refractive Index
1.670-1.7341.752-1.815
1
3.25
👆🏻
Optic Character
-
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Crystal System
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Orthorhombic
Birefringence
-99990.063
0
0.296
👆🏻
Clarity
TranslucentAnthony et al
Translucent
Physical
Neurological
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Cardiovascular
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Respiratory
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Good
Reproductive
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Digestive
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Psychology
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Communication
Healing
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Emotional healing
Qualities Associated
Emotional Healing
Communication