1 Physical Properties
1.2 Tenacity
1.5 Solubility
1.7 Durability
Not Available
Not Available
1.3 Specific Gravity
Not Available3.30-3.50
1
7.18
1.20 Fracture
Not Available
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
1.21 Cleavage
Not Available
Perfect on {110}, poor on {101}, {001} rare
1.22 Mohs Hardness
1.23 Chemical Composition
Not Available
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references