Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.74-2.902.62-2.67
1
7.18
👆🏻
Fracture
Uneven, Splintery
Uneven
Cleavage
Perfect on {100} and {001}
From the Greek, oligos and kasein, little cleavage.
Mohs Hardness
4.5-56-6.5
2
10
👆🏻
Chemical Composition
Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)