1 Astrology
1.1 Origin
Brazil
Southern and central Africa, Sixth Edition (2006)
1.2 Color
Yellow, White, Brown, Brownish, Black
Blue, Green, Blue, Brown
1.3 Streak
Brown, Yellow, White
White, Blue, Green
1.4 For which Rashi?
1.5 Planet
1.6 Element of Planets
1.7 How to Wear?
1.7.1 Finger
Not Available
Not Available
1.7.2 Ring Metal
Not Available
Not Available
1.8 Energy
1.9 Deities
1.10 Not to wear with
Not Available
Not Available
1.11 Powers
1.12 Birthstone
1.12.1 Planetary
Not Available
Not Available
1.12.2 Talisman
Not Available
Not Available
2 Physical Properties
2.1 Tenacity
2.2 Solubility
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
3.06-3.252.00-2.45
1
7.18
2.5 Fracture
Sub-Conchoidal, ConchoidalArthur Thomas, Conchoidal, Uneven
Sub-Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
2.6 Cleavage
Poor/indistinct on {100}
none
2.7 Mohs Hardness
2.8 Chemical Composition
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
Cu2H2Si2O5(OH)4
3 Optical Properties
3.1 Luster
Vitreous, Resinous
Vitreous, Greasy
3.2 Pleochroism
visible
AbsentWalter Schumann
3.3 Dispersion
3.4 Transparency
3.5 Refractive Index
1.639-1.6721.460-1.570
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
3.8 Birefringence
0.027-0.0420.023-0.050
0
0.296
3.9 Clarity
Transparent
Gemmological Tables (2004) More from other references
4 Benefits
4.1 Physical
4.1.1 Neurological
Not Available
Not Available
4.1.2 Cardiovascular
Not Available
Not Available
4.1.3 Respiratory
Not Available
Not Available
4.1.4 Reproductive
Not Available
Not Available
4.1.5 Digestive
Not Available
Not Available
4.2 Psychology
Not Available
Not Available
4.3 Healing
Not Available
Not Available
4.4 Qualities Associated
Not Available
Not Available