1 Astrology
1.1 Origin
Not Available, Southern and central Africa
Tanzania, Yellow, green, Yellow, green
1.2 Color
1.3 Streak
gray, White, gray, White
White, Colorless
1.4 For which Rashi?
Not Available
Sagittarius, Pisces, Virgo, Sagittarius, Pisces, Virgo, Sagittarius, Pisces, Virgo
1.5 Planet
Not Available
Not Available
1.6 Element of Planets
Not Available
Air, Water, Earth
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
Not Available
Receptive, Projective
1.9 Deities
1.10 Not to wear with
Not Available
Not Available
1.11 Powers
Not Available
Love, Healing
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
Not Available
Not Available
2.2 Solubility
Not Available
Not Available
2.3 Durability
2.4 Specific Gravity
2.5 Fracture
Handbook of mineralogy (2001)
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
2.6 Cleavage
None
Perfect {010}, imperfect {100}
2.7 Mohs Hardness
2.8 Chemical Composition
Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
Ca2Al3(SiO4)3(OH)
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Strong: pale lavender dark blueAnthony et al
Present
3.3 Dispersion
3.4 Transparency
TranslucentAnthony et al, Translucent
Transparent, Translucent, Transparent to translucent
3.5 Refractive Index
Not Available1.685-1.707
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Orthorhombic
3.8 Birefringence
Not Available0.006-0.018
0
0.296
3.9 Clarity
TranslucentAnthony et al
TransparentUlrich Henn and Claudio C. Milisenda
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