Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
6.30-6.392.50-2.80
1
7.18
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Fracture
Conchoidal
-
Cleavage
[001] good, [210] distinct
Perfect
Mohs Hardness
3-3.55-6.5
2
10
👆🏻
Chemical Composition
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Na 4(Al,Si) 12O 24Cl to Ca 4(Si,Al) 12O 24(CO 3,SO 4)Arthur Thomas , Gemstones (2009)