Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.352.9-3.5
1
7.18
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Fracture
Conchoidal
Conchoidal
Cleavage
Perfect on {100}, imperfect on {001}
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
2.55.5-6
2
10
👆🏻
Chemical Composition
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)