1 Astrology
1.1 Origin
Southern and central Africa
1.2 Color
Black, Reddish, gray
1.3 Streak
Black, Red
1.4 For which Rashi?
Not Available
1.5 Planet
Not Available
1.6 Element of Planets
Not Available
1.7 How to Wear?
1.7.1 Finger
Not Available
1.7.2 Ring Metal
Not Available
1.8 Energy
Not Available
1.9 Deities
Not Available
1.10 Not to wear with
Not Available
1.11 Powers
Not Available
1.12 Birthstone
1.12.1 Planetary
Not Available
1.12.2 Talisman
Not Available
2 Physical Properties
2.1 Tenacity
Brittle
2.2 Solubility
Not Available
2.3 Durability
Not Available
2.4 Specific Gravity
5.51-5.64
Check 5.51-5.64 Range Gemstones!
1
7.18
2.5 Fracture
Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
2.6 Cleavage
Distinct on {10 1 1}
2.7 Mohs Hardness
2.5
Check 2.5 Range Gemstones!
2
10
2.8 Chemical Composition
Ag 3AsS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
3 Optical Properties
3.1 Luster
Adamantine
3.2 Pleochroism
Moderate; cochineal-red to blood-red
3.3 Dispersion
Not Available
Rank: N/A (Overall) ▶
0.007
1
3.4 Transparency
OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) Rarely transparentMore from other references
3.5 Refractive Index
2.792-3.087
Check 2.792-3.087 Range Gemstones!
1
3.25
3.6 Optic Character
Not Available
3.7 Crystal System
Trigonal
3.8 Birefringence
0.295-0.296
Check 0.295-0.296 Range Gemstones!
0
0.296
3.9 Clarity
OpaqueUlrich Henn and Claudio C. Milisenda
4 Benefits
4.1 Physical
4.1.1 Neurological
Not Available
4.1.2 Cardiovascular
Not Available
4.1.3 Respiratory
Not Available
4.1.4 Reproductive
Not Available
4.1.5 Digestive
Not Available
4.2 Psychology
Not Available
4.3 Healing
Not Available
4.4 Qualities Associated
Not Available