Origin
Southern and central Africa
Southern and central Africa
Color
-
Black, Reddish, gray, Red
Streak
-
Black, Brown, Reddish, Red
For which Rashi?
-
Aries, Aquarius
Specific Gravity
3.62-3.80
5.00-5.30
Fracture
Conchoidal
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
None
None, may show partings on {0001} and {10 1 1}
Chemical Composition
Mg 3(Al,Cr) 2(SiO 4) 3Gemdat.org , Management Team (2012)
Fe 2O 3Arthur Thomas , Gemstones (2009)
Pleochroism
-
O = brownish red; E = yellowish red
Transparency
-
OpaqueHerve Nicolas Lazzarelli
Refractive Index
1.720-1.740
2.690-3.220
Crystal System
-
Trigonal
Birefringence
-9999
0.280
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
OpaqueHerve Nicolas Lazzarelli
Cardiovascular
Supports heart health
Supports heart health
Psychology
Passion
Grounding
Healing
Emotional healing
Physical healing
Qualities Associated
Passion
Grounding