Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.32-3.432.60-2.65
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
Poor on {110} and {100} very poor on {001}
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
6-76-6.5
2
10
👆🏻
Chemical Composition
Ca10(Mg,Fe)2Al4(SiO4)5(Si2O7)2(OH)4
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)