Origin
Southern and central Africa
Brazil
Color
Blue, Violet, Brown, White, Greenish, pink
Yellow, Brown, Black, Colorless, White, Brownish
Streak
White
White
For which Rashi?
Leo, Sagittarius
-
Planet
Saturn
-
Element of Planets
Water
-
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
Isis
-
Not to wear with
-
-
Powers
Healing
-
Birthstone
Planetary
-
-
Talisman
-
-
Tenacity
-
Brittle
Solubility
-
Effervesces in hot HCl
Durability
-
-
Specific Gravity
3.26-3.412.92-3.12
1
7.18
👆🏻
Fracture
Fibrous, ConchoidalWalter Schumann
Conchoidal
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
[10 1 1] perfect
Mohs Hardness
7-8.53.5-4.5
2
10
👆🏻
Chemical Composition
AlAl6O3BSi3O18
MgCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Vitreous
Vitreous
Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
-
Dispersion
0.010.03
0.005
1
👆🏻
Transparency
Translucent, Translucent to opaque
Translucent
Refractive Index
1.669-1.7231.509-1.720
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Orthorhombic
Trigonal
Birefringence
0.011-0.0370.191
0
0.296
👆🏻
Clarity
Translucent
Translucent
Physical
Neurological
Enhances mental clarity and focus
-
Cardiovascular
-
-
Respiratory
Good
Good
Reproductive
-
-
Digestive
-
Supports digestive health
Psychology
Patience
Calming
Healing
Emotional healing
Emotional healing
Qualities Associated
Patience
Relaxation