Astrology
Origin
Italy, Canada
Sri Lanka
Color
Blue, Red, Yellow, Colorless, Blue, Colorless, Green, Yellow, White, Blue, Colorless, Green, Yellow, White
Black, Brownish, Reddish, Brown, Red, Yellow, White, Colorless, Brown, Brownish, Black, Colorless, Green, gray
Streak
White
White, Brownish, Brownish, White
For which Rashi?
Not Available
Not Available
Planet
Not Available
Not Available
Element of Planets
Not Available
Not Available
Energy
Not Available
Not Available
How to Wear?
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Deities
Not Available
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Not to wear with
Not Available
Not Available
Powers
Not Available
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Birthstone
Planetary
Not Available
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Talisman
Not Available
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Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
insoluble
Durability
Not Available
Not Available
Specific Gravity
2.90-3.10
6.86-7.03
Fracture
Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Irregular
Cleavage
Poor/indistinct on {1120} and {1011}
{100} imperfect, {110} indistinct; partings on {111} or {011}
Mohs Hardness
7
6-7
Chemical Composition
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Optical Properties
Luster
Vitreous
Adamantine, Greasy
Pleochroism
Pale green
Pleochroic haloes have been observed. Dichroic in yellow
Dispersion
0.02
22
0.07
6
Transparency
Transparent
Transparent, Translucent
Refractive Index
1.614-1.666
1.990-2.105
Optic Character
Not Available
Not Available
Crystal System
Trigonal
tetragonal
Birefringence
0.014-0.032
0.096-0.098
Clarity
Transparent
Transparent
Benefits
Physical
Neurological
Not Available
Not Available
Cardiovascular
Not Available
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Respiratory
Not Available
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Reproductive
Not Available
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Digestive
Not Available
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Psychology
Not Available
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Healing
Not Available
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Qualities Associated
Not Available
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