Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.83-3.892.62-2.67
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Uneven
Cleavage
Perfect on {01 1 1}
From the Greek, oligos and kasein, little cleavage.
Mohs Hardness
3.5-4.56-6.5
2
10
👆🏻
Chemical Composition
Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)