Tenacity
-
-
Solubility
-
Insoluble in acids
Durability
-
-
Specific Gravity
3.32-3.434.20-4.30
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
Poor on {110} and {100} very poor on {001}
{110} good, 100 moderate, parting on {092} and {011}
Mohs Hardness
6-76-6.5
2
10
👆🏻
Chemical Composition
Ca10(Mg,Fe)2Al4(SiO4)5(Si2O7)2(OH)4
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)