Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.93.82-3.97
1
7.18
👆🏻
Fracture
Conchoidal
Subconchoidal, Conchoidal
Cleavage
{???} Indistinct
Perfect on [001] and [011]
Mohs Hardness
4.55.5-6
2
10
👆🏻
Chemical Composition
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
TiO 2Michael OâDonoghue , Gems, Sixth edition (2006) More from other references