Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.32-4.483.03-3.18
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Conchoidal
Uneven, Irregular, Conchoidal
Cleavage
{101}, good; {010}, poor
{???} Indistinct
Mohs Hardness
3.57-7.5
2
10
👆🏻
Chemical Composition
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)