Tenacity
-
Brittle
Solubility
Soluble
-
Durability
-
-
Specific Gravity
2.55-2.705.9-6.3
1
7.18
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Fracture
Uneven, Splintery, Conchoidal
Conchoidal, Uneven
Cleavage
Absent
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
Mohs Hardness
6.5-74.5-5
2
10
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Chemical Composition
SiO2
CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references