Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.085.9-6.3
1
7.18
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Fracture
Uneven, Irregular, Conchoidal
Conchoidal, Uneven
Cleavage
None
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
Mohs Hardness
6.54.5-5
2
10
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Chemical Composition
Ca 3Al 2(SiO 4) 3-x(OH) 4x (x=0.2 to 1.5)Anthony et al , Handbook of mineralogy (2001)
CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references