Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.00-5.304.33-4.42
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
-
Cleavage
None, may show partings on {0001} and {10 1 1}
Perfect
Mohs Hardness
64.5
2
10
👆🏻
Chemical Composition
Fe 2O 3Arthur Thomas , Gemstones (2009)
Ca(Nd,Ce,La) 2(CO 3) 3F 2Ulrich Henn and Claudio C.