Origin
Brazil, Southern and central Africa
Southern and central Africa
Color
Blue, Green, Black
Black, Reddish, gray, Red
Streak
White
Black, Brown, Reddish, Red
For which Rashi?
Gemini, Sagittarius
Aries, Aquarius
Planet
Jupiter
Saturn
Element of Planets
-
-
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
-
Mars
Not to wear with
-
-
Powers
-
Healing
Birthstone
Planetary
-
Talisman
-
-
Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.04-3.175.00-5.30
1
7.18
👆🏻
Fracture
Uneven
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
{001} Indistinct, {???} Indistinct
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
5.56
2
10
👆🏻
Chemical Composition
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Fe 2O 3Arthur Thomas , Gemstones (2009)
Luster
-
-
Pleochroism
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli
O = brownish red; E = yellowish red
Dispersion
0.010.05
0.005
1
👆🏻
Transparency
Transparent, Translucent
OpaqueHerve Nicolas Lazzarelli
Refractive Index
1.604-1.6462.690-3.220
1
3.25
👆🏻
Optic Character
-
-
Crystal System
monoclinic
Trigonal
Birefringence
0.031-0.0360.280
0
0.296
👆🏻
Clarity
Transparent
OpaqueHerve Nicolas Lazzarelli
Physical
Neurological
Balances digestive system and reduces bloating
-
Cardiovascular
-
Supports heart health
Respiratory
Excellent
Good
Reproductive
-
-
Digestive
Supports digestive health
-
Psychology
Clarity
Grounding
Healing
Emotional healing
Physical healing
Qualities Associated
Psychic Abilities
Grounding