Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.62-3.805.00-5.30
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
None
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
7-7.56
2
10
👆🏻
Chemical Composition
Mg 3(Al,Cr) 2(SiO 4) 3Gemdat.org , Management Team (2012)
Fe 2O 3Arthur Thomas , Gemstones (2009)