Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.89-4.182.33-2.37
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
ConchoidalWalter Schumann
Cleavage
{0001}, {11 2 0} imperfect
Perfect on {010}, good on {100}
Mohs Hardness
5.57.5
2
10
👆🏻
Chemical Composition
Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Be 2BO 3(OH)Ulrich Henn and Claudio C.