Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.32-4.483.355-3.433
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Conchoidal
Uneven
Cleavage
{101}, good; {010}, poor
{???} Good, {???} Good
Mohs Hardness
3.5-9999
2
10
👆🏻
Chemical Composition
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
(Ca,Mn2+ ,Fe2+ ) 3Al 2BSi 4O 15(OH)Anthony et al , Handbook of mineralogy (2001)