Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.353.04-3.17
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Perfect on {100}, imperfect on {001}
{001} Indistinct, {???} Indistinct
Mohs Hardness
2.55.5
2
10
👆🏻
Chemical Composition
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references