Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.16-3.432.33-2.37
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
ConchoidalWalter Schumann
Cleavage
{110} Good, {110} Good
Perfect on {010}, good on {100}
Mohs Hardness
5-67.5
2
10
👆🏻
Chemical Composition
(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)
Be 2BO 3(OH)Ulrich Henn and Claudio C.