1 Astrology
1.2 Origin
Southern and central Africa
Sri Lanka
2.3 Color
Blue
Black, Brownish, Reddish, Brown, Red, Yellow, White, Colorless, Brown, Brownish, Black, Colorless, Green, gray
2.5 Streak
Not Available
White, Brownish, Brownish, White
3.2 For which Rashi?
Not Available
Not Available
3.4 Planet
Not Available
Not Available
3.6 Element of Planets
Not Available
Not Available
3.8 Energy
Not Available
Not Available
3.10 How to Wear?
3.10.1 Finger
Not Available
Not Available
3.11.1 Ring Metal
Not Available
Not Available
3.12 Deities
Not Available
Not Available
3.13 Not to wear with
Not Available
Not Available
3.14 Powers
Not Available
Not Available
3.15 Birthstone
3.15.1 Planetary
Not Available
Not Available
3.15.2 Talisman
Not Available
Not Available
4 Physical Properties
4.1 Tenacity
4.2 Solubility
4.3 Durability
Not Available
Not Available
4.4 Specific Gravity
3.13-3.266.86-7.03
1
7.18
4.14 Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Irregular
4.15 Cleavage
Not Available
{100} imperfect, {110} indistinct; partings on {111} or {011}
4.16 Mohs Hardness
7.4 Chemical Composition
Ca 5(F,Cl)(PO 4) 3Arthur Thomas , Gemstones (2009)
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
8 Optical Properties
8.1 Luster
Not Available
Adamantine, Greasy
8.2 Pleochroism
Not Available
Pleochroic haloes have been observed. Dichroic in yellow
8.3 Dispersion
8.10 Transparency
Gemmological Tables (2004)
Transparent, Translucent
8.11 Refractive Index
1.628-1.6511.990-2.105
1
3.25
8.21 Optic Character
Not Available
Not Available
8.22 Crystal System
8.23 Birefringence
0.002-0.0080.096-0.098
0
0.296
11.6 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent
12 Benefits
12.1 Physical
12.1.1 Neurological
Not Available
Not Available
12.1.2 Cardiovascular
Not Available
Not Available
12.1.3 Respiratory
Not Available
Not Available
12.1.4 Reproductive
Not Available
Not Available
12.1.5 Digestive
Not Available
Not Available
12.2 Psychology
Not Available
Not Available
12.3 Healing
Not Available
Not Available
12.4 Qualities Associated
Not Available
Not Available