Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.352.90-2.98
1
7.18
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Fracture
Conchoidal
Conchoidal
Cleavage
Perfect on {100}, imperfect on {001}
Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.
Mohs Hardness
2.53.5
2
10
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Chemical Composition
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references