1 Astrology
1.2 Origin
Not Available
Brazil, Southern and central Africa
1.3 Color
Not Available
Blue, Green, Black
1.5 Streak
1.8 For which Rashi?
Taurus
Gemini, Sagittarius, Gemini, Sagittarius, Gemini, Sagittarius
1.10 Planet
1.13 Element of Planets
Earth, Water
Not Available
1.16 Energy
1.19 How to Wear?
1.19.1 Finger
Not Available
Not Available
1.21.2 Ring Metal
Not Available
Not Available
1.23 Deities
1.2 Not to wear with
Not Available
Not Available
2.1 Powers
2.5 Birthstone
2.5.1 Planetary
Not Available
Not Available
2.9.1 Talisman
Not Available
Not Available
3 Physical Properties
3.1 Tenacity
Not Available
Not Available
4.2 Solubility
Not Available
Not Available
4.5 Durability
Not Available
Not Available
4.8 Specific Gravity
Not Available3.04-3.17
1
7.18
5.8 Fracture
Not Available
Uneven, Uneven, Gemstones of the world (2001) More from other references
5.10 Cleavage
Not Available
{001} Indistinct, {???} Indistinct
5.11 Mohs Hardness
6.3 Chemical Composition
Not Available
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
7 Optical Properties
7.2 Luster
Not Available
Not Available
7.3 Pleochroism
Not Available
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli
8.3 Dispersion
8.10 Transparency
Not Available
Transparent, Translucent
8.11 Refractive Index
Not Available1.604-1.646
1
3.25
8.17 Optic Character
Not Available
Not Available
8.19 Crystal System
8.20 Birefringence
Not Available0.031-0.036
0
0.296
10.3 Clarity
Not Available
Transparent
11 Benefits
11.1 Physical
11.1.1 Neurological
Not Available
Not Available
11.1.2 Cardiovascular
Not Available
Not Available
11.1.3 Respiratory
Not Available
Not Available
11.1.4 Reproductive
Not Available
Not Available
11.1.5 Digestive
Not Available
Not Available
11.2 Psychology
Not Available
Not Available
11.3 Healing
Not Available
Not Available
11.4 Qualities Associated
Not Available
Not Available