Tenacity
Brittle
Very brittle
Solubility
-
insoluble
Durability
-
-
Specific Gravity
5.00-5.303.30-3.40
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Conchoidal
Cleavage
None, may show partings on {0001} and {10 1 1}
{010} perfect, {110} distinct, {100} in traces
Mohs Hardness
66.5-7
2
10
👆🏻
Chemical Composition
Fe 2O 3Arthur Thomas , Gemstones (2009)
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references