Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.62-2.673.05-3.08
1
7.18
👆🏻
Fracture
Uneven
Subconchoidal, Uneven, Conchoidal
Cleavage
From the Greek, oligos and kasein, little cleavage.
Poor on {100}
Mohs Hardness
6-6.55
2
10
👆🏻
Chemical Composition
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)