Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.00-5.302.60-2.65
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Uneven, Conchoidal
Cleavage
None, may show partings on {0001} and {10 1 1}
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
66-6.5
2
10
👆🏻
Chemical Composition
Fe 2O 3Arthur Thomas , Gemstones (2009)
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)