Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.28-3.325.00-5.30
1
7.18
👆🏻
Fracture
Uneven
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
{101} Distinct
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
6-6.56
2
10
👆🏻
Chemical Composition
ThCa 2Si 8O 20Walter Schumann , Gemstones of the world (2001) More from other references
Fe 2O 3Arthur Thomas , Gemstones (2009)