Origin
Southern and central Africa
Southern and central Africa
Color
Black, Reddish, gray, Red
Green
Streak
Black, Brown, Reddish, Red
Greenish, White
For which Rashi?
Aries, Aquarius, Aries, Aquarius, Aries, Aquarius
Not Available
Planet
Saturn
Not Available
Element of Planets
Not Available
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
Projective
Not Available
Deities
Mars
Not Available
Not to wear with
Not Available
Not Available
Powers
Healing
Not Available
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
5.00-5.30
3.16-3.43
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
None, may show partings on {0001} and {10 1 1}
{110} Good, {110} Good
Chemical Composition
Fe 2O 3Arthur Thomas , Gemstones (2009)
(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)
Luster
Not Available
Vitreous
Pleochroism
O = brownish red; E = yellowish red
Weak: colorless -- very pale green -- very pale green
Dispersion
Not Available
Not Available
Transparency
OpaqueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
TranslucentAnthony et al, Handbook of mineralogy (2001)
Refractive Index
2.690-3.220
1.662-1.723
Optic Character
Not Available
Not Available
Crystal System
Trigonal
Not Available
Birefringence
0.280
Not Available
Clarity
OpaqueHerve Nicolas Lazzarelli
TranslucentAnthony et al
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