Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.0-3.53.87-4.14
1
7.18
👆🏻
Fracture
Uneven
Subconchoidal, Conchoidal
Cleavage
Perfect
Poor on {120}, in traces on {001}
Mohs Hardness
5-65.5-6
2
10
👆🏻
Chemical Composition
Na(CaNa)(Mg,Fe++)5(Si8O22)(OH)2
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references