Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.70-2.752.9
1
7.18
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Fracture
Conchoidal
Conchoidal
Cleavage
From the Greek for luster, for its pearly luster on the cleavage.
{???} Indistinct
Mohs Hardness
4.5-54.5
2
10
👆🏻
Chemical Composition
Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)