Tenacity
Brittle
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
3.30-3.503.63-3.79
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Uneven, Conchoidal
Cleavage
Perfect on {110}, poor on {101}, {001} rare
{110} Good
Mohs Hardness
53.5
2
10
👆🏻
Chemical Composition
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SrCO 3Walter Schumann , Gemstones of the world (2001) More from other references