Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.6-3.32.33-2.37
1
7.18
👆🏻
Fracture
Lamellar
ConchoidalWalter Schumann
Cleavage
Perfect 001
Perfect on {010}, good on {100}
Mohs Hardness
2-2.57.5
2
10
👆🏻
Chemical Composition
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6
Be 2BO 3(OH)Ulrich Henn and Claudio C.