1 Astrology
1.2 Origin
Brazil, Southern and central Africa
Madagascar, Tanzania
1.5 Color
Blue, Green, Black
White, Colorless, Blue, Red, Green, Yellow, Violet
1.8 Streak
1.10 For which Rashi?
Gemini, Sagittarius, Gemini, Sagittarius, Gemini, Sagittarius
Not Available
1.12 Planet
1.15 Element of Planets
Not Available
Not Available
1.18 How to Wear?
1.18.1 Finger
Not Available
Not Available
1.18.2 Ring Metal
Not Available
Not Available
1.19 Energy
2.2 Deities
2.4 Not to wear with
Not Available
Not Available
2.6 Powers
Not Available
Not Available
2.8 Birthstone
2.8.1 Planetary
Not Available
Not Available
2.8.2 Talisman
Not Available
Not Available
3 Physical Properties
3.1 Tenacity
Not Available
Not Available
3.2 Solubility
Not Available
Not Available
3.3 Durability
Not Available
Not Available
3.4 Specific Gravity
3.04-3.17Not Available
1
7.18
3.8 Fracture
Uneven, Uneven, Gemstones of the world (2001) More from other references
Not Available
3.9 Cleavage
{001} Indistinct, {???} Indistinct
Not Available
3.10 Mohs Hardness
4.4 Chemical Composition
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Not Available
5 Optical Properties
5.1 Luster
Not Available
Not Available
5.2 Pleochroism
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli
Not Available
5.3 Dispersion
5.6 Transparency
Transparent, Translucent
Not Available
5.7 Refractive Index
1.604-1.6461.73-1.81
1
3.25
5.9 Optic Character
Not Available
Not Available
5.11 Crystal System
5.13 Birefringence
0.031-0.036Not Available
0
0.296
5.14 Clarity
Transparent
Color grading system
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
6.3 Psychology
Not Available
Not Available
6.4 Healing
Not Available
Not Available
7.2 Qualities Associated
Not Available
Not Available