Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.9-6.32.55-2.65
1
7.18
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Fracture
Conchoidal, Uneven
Subconchoidal, Conchoidal
Cleavage
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
[1010] Poor
Mohs Hardness
4.5-55-6
2
10
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Chemical Composition
CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.