Tenacity
Brittle
-
Solubility
-
insoluble in water
Durability
-
-
Specific Gravity
5.00-5.302.51-2.63
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Fibrous
Cleavage
None, may show partings on {0001} and {10 1 1}
Perfect basal
Mohs Hardness
62.5-4.5
2
10
👆🏻
Chemical Composition
Fe 2O 3Arthur Thomas , Gemstones (2009)
Mg 3(Si 2O 5)(OH) 4Gemdat.org , Management Team (2012)