Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.353.80-4.15
1
7.18
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Fracture
Conchoidal
Uneven
Cleavage
Perfect on {100}, imperfect on {001}
perfect along [010] and [100]
Mohs Hardness
2.53.5-4
2
10
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Chemical Composition
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references