Origin
Afghanistan, Southern and central Africa
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Color
Grey, White, Colorless, gray, Pale pink, Blue
Blue, Green
Streak
White
Blue
For which Rashi?
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Planet
-
-
Element of Planets
-
-
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
-
-
Birthstone
Planetary
-
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Talisman
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Tenacity
Brittle
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Solubility
Readily soluble in HF
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Durability
-
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Specific Gravity
2.86-2.943.80-4.15
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven
Cleavage
None observed
perfect along [010] and [100]
Mohs Hardness
6.5-73.5-4
2
10
👆🏻
Chemical Composition
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Vitreous, Greasy
Silky
Pleochroism
-
X = very pale blue; Y = pale blue; Z = deep blue
Dispersion
0.010.02
0.005
1
👆🏻
Transparency
Transparent, Translucent
Translucent
Refractive Index
1.517-1.5251.752-1.815
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Isometric
Orthorhombic
Birefringence
-99990.063
0
0.296
👆🏻
Clarity
Transparent
Translucent
Physical
Neurological
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Cardiovascular
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Respiratory
Good
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
Harmony
Communication