Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.40-4.202.33-2.37
1
7.18
👆🏻
Fracture
-
ConchoidalWalter Schumann
Cleavage
Indistinct
Perfect on {010}, good on {100}
Mohs Hardness
-99997.5
2
10
👆🏻
Chemical Composition
Ca(Ce,La,Y,Ca)Al2(Fe,Al)Si3O12(OH)
Be 2BO 3(OH)Ulrich Henn and Claudio C.