Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.93.34-3.44
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
{???} Indistinct
{111} Indistinct, {111} Indistinct, {111} Indistinct
Mohs Hardness
4.58-8.5
2
10
👆🏻
Chemical Composition
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
(K,Cs)Al 4Be 4(B,Be) 12O 28Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references