Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.2-2.65.00-5.30
1
7.18
👆🏻
Fracture
Uneven
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
None
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
3-46
2
10
👆🏻
Chemical Composition
(Fe+++,Al)25(PO4)17O6(OH)12•75(H2O)
Fe 2O 3Arthur Thomas , Gemstones (2009)