Astrology
Origin
Southern and central Africa, violet, blue, violet, blue
Canada, USA, Tanzania, Norway
Color
Blue, Violet, Brown, White, Blue, Brown, Violet, Greenish, pink
Red, Yellow, Brown, Yellow, Red, pink, Green
Streak
White
Not Available
For which Rashi?
Leo, Sagittarius, Leo, Sagittarius, Leo, Sagittarius
Leo
Planet
Saturn
Sun
Element of Planets
Water
Not Available
Energy
Receptive
Projective
How to Wear?
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Deities
Isis
Not Available
Not to wear with
Not Available
Not Available
Powers
Healing
Protection
Birthstone
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.26-3.41
2.62-2.65
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Gemstones of the world (2001)
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
001
Mohs Hardness
7-8.5
6
Chemical Composition
AlAl6O3BSi3O18
Microcline: KAlSi3O8 Oligoclase: (Na,Ca)Al1-2Si3-2O8
Optical Properties
Luster
Vitreous
Vitreous
Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
Weak or absentWalter Schumann
Dispersion
None
None
Transparency
Translucent, Translucent to opaque
Transparent, Translucent, Transparent to translucent
Refractive Index
1.669-1.723
1.53-1.55
Optic Character
Not Available
Not Available
Crystal System
Orthorhombic
Triclinic
Birefringence
0.011-0.037
0.007-0.010
Clarity
Translucent
Transparent to translucent
Benefits
Physical
Neurological
Not Available
Not Available
Cardiovascular
Not Available
Not Available
Respiratory
Not Available
Not Available
Reproductive
Not Available
Not Available
Digestive
Not Available
Not Available
Psychology
Not Available
Not Available
Healing
Not Available
Not Available
Qualities Associated
Not Available
Not Available
