Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.6-5.764.95-5.0
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
[001] perfect; [100] distinct
Imperfect to indistinct on {10 1 0}, parting on {0001}
Mohs Hardness
2.5-34-5
2
10
👆🏻
Chemical Composition
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references