Tenacity
Brittle
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
5.9-6.32.67-2.73
1
7.18
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Fracture
Conchoidal, Uneven
Conchoidal
Cleavage
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
Perfect on [10 1 1] three directions with angle of 74° 55
Mohs Hardness
4.5-53
2
10
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Chemical Composition
CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaCO 3Ulrich Henn and Claudio C.