Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.723.25-3.35
1
7.18
👆🏻
Fracture
-
Conchoidal, ConchoidalWalter Schumann
Cleavage
{110} Perfect, {010} Perfect
Perfect in three directions
Mohs Hardness
5-65
2
10
👆🏻
Chemical Composition
Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references