Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.1773.87-4.14
1
7.18
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Fracture
Uneven, Conchoidal
Subconchoidal, Conchoidal
Cleavage
{???} Distinct
Poor on {120}, in traces on {001}
Mohs Hardness
6-6.55.5-6
2
10
👆🏻
Chemical Composition
Mg 3(SiO 4)(F,OH) 2Anthony et al , Handbook of Mineralogy (2001)
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references