Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
4.95-5.02.74-2.90
1
7.18
👆🏻
Fracture
Uneven
Uneven, Splintery
Cleavage
Imperfect to indistinct on {10 1 0}, parting on {0001}
Perfect on {100} and {001}
Mohs Hardness
4-54.5-5
2
10
👆🏻
Chemical Composition
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.