Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.32-3.433.69-3.81
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal to uneven, ConchoidalWalter Schumann
Cleavage
Poor on {110} and {100} very poor on {001}
Distinct on {110}, imperfect on {010}, poor on {001}
Mohs Hardness
6-78.5
2
10
👆🏻
Chemical Composition
Ca10(Mg,Fe)2Al4(SiO4)5(Si2O7)2(OH)4
BeAl 2 O 4