Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.08-2.165.00-5.30
1
7.18
👆🏻
Fracture
Irregular/uneven
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
distinct/good on {1011}
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
4.56
2
10
👆🏻
Chemical Composition
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)
Fe 2O 3Arthur Thomas , Gemstones (2009)