Tenacity
-
-
Solubility
Insoluble in acids
-
Durability
-
-
Specific Gravity
4.20-4.303.32-3.43
1
7.18
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Fracture
Uneven, Conchoidal
Conchoidal
Cleavage
{110} good, 100 moderate, parting on {092} and {011}
Poor on {110} and {100} very poor on {001}
Mohs Hardness
6-6.56-7
2
10
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Chemical Composition
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Ca10(Mg,Fe)2Al4(SiO4)5(Si2O7)2(OH)4