Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.70-2.755.6-5.76
1
7.18
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Fracture
Conchoidal
Uneven
Cleavage
From the Greek for luster, for its pearly luster on the cleavage.
[001] perfect; [100] distinct
Mohs Hardness
4.5-52.5-3
2
10
👆🏻
Chemical Composition
Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)