Tenacity
-
Brittle
Solubility
Insoluble in acids
-
Durability
-
-
Specific Gravity
4.20-4.302.33-2.37
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
ConchoidalWalter Schumann
Cleavage
{110} good, 100 moderate, parting on {092} and {011}
Perfect on {010}, good on {100}
Mohs Hardness
6-6.57.5
2
10
👆🏻
Chemical Composition
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Be 2BO 3(OH)Ulrich Henn and Claudio C.