Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.9-6.32.95-3.07
1
7.18
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Fracture
Conchoidal, Uneven
Conchoidal
Cleavage
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
Perfect on {110} at 56° and 124°; partings on {010} and {100}
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
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.