1 Astrology
1.1 Origin
India, Southern and central Africa, Madagascar
Sri Lanka
1.2 Color
Black, Brownish, Greenish
Red, Brown, Black
1.3 Streak
1.4 For which Rashi?
Not Available
Not Available
1.5 Planet
Not Available
Not Available
1.7 Element of Planets
Not Available
Not Available
1.9 How to Wear?
1.9.1 Finger
Not Available
Not Available
1.10.1 Ring Metal
Not Available
Not Available
1.11 Energy
Not Available
Not Available
1.12 Deities
Not Available
Not Available
1.13 Not to wear with
Not Available
Not Available
1.14 Powers
Not Available
Not Available
1.15 Birthstone
1.15.1 Planetary
Not Available
Not Available
1.15.2 Talisman
Not Available
Not Available
2 Physical Properties
2.1 Tenacity
Not Available
Not Available
2.2 Solubility
Not Available
Not Available
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
3.18-3.222.97-3.14
1
7.18
3.4 Fracture
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Uneven, Conchoidal, Brittle
3.5 Cleavage
{1011} Indistinct
{1011} Indistinct
3.6 Mohs Hardness
Not AvailableNot Available
2
10
3.8 Chemical Composition
Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Ca(Mg 3)MgAl 5(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
4 Optical Properties
4.1 Luster
4.2 Pleochroism
Very strong: yellow-brown pale yellow
Pale yellow colorlessAnthony et al
4.3 Dispersion
4.7 Transparency
Transparent, Translucent
Transparent
4.8 Refractive Index
1.635-1.6721.614-1.666
1
3.25
5.5 Optic Character
Not Available
Not Available
5.6 Crystal System
Not Available
Not Available
5.7 Birefringence
5.8 Clarity
6 Benefits
6.1 Physical
6.1.1 Neurological
Not Available
Not Available
6.1.2 Cardiovascular
Not Available
Not Available
6.1.3 Respiratory
Not Available
Not Available
6.1.4 Reproductive
Not Available
Not Available
6.1.5 Digestive
Not Available
Not Available
6.2 Psychology
Not Available
Not Available
6.3 Healing
Not Available
Not Available
6.4 Qualities Associated
Not Available
Not Available