Tenacity
Sectile
Brittle
Solubility
Soluble
-
Durability
-
-
Specific Gravity
6.132.45
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
Distinct on {001} and {110}, indistinct on {100}
Perfect on {001}, good on {110}
Mohs Hardness
2-34-4.5
2
10
👆🏻
Chemical Composition
Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KNa 4Ca 4Si 8O 18(CO 3) 4(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)