Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.93.90-4.00
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
{???} Indistinct
Perfect on {001}, good on {210}, poor on {010}
Mohs Hardness
4.53-3.5
2
10
👆🏻
Chemical Composition
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references