Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.0-3.36.30-6.39
1
7.18
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Fracture
Uneven, Conchoidal, Conchoidal to uneven
Conchoidal
Cleavage
On {10 1 1} perfect; parting on {10 1 2}
[001] good, [210] distinct
Mohs Hardness
3.5-43-3.5
2
10
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Chemical Composition
MnCO3
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references