Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.55-2.656.30-6.39
1
7.18
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Fracture
Subconchoidal, Conchoidal
Conchoidal
Cleavage
[1010] Poor
[001] good, [210] distinct
Mohs Hardness
5-63-3.5
2
10
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Chemical Composition
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references