Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.95.50-5.90
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
{???} Indistinct
On {10 1 0}, perfect; parting on {000 1 }
Mohs Hardness
4.54
2
10
👆🏻
Chemical Composition
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)