Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.95-5.02.50-2.80
1
7.18
👆🏻
Fracture
Uneven
-
Cleavage
Imperfect to indistinct on {10 1 0}, parting on {0001}
Perfect
Mohs Hardness
4-55-6.5
2
10
👆🏻
Chemical Composition
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 4(Al,Si) 12O 24Cl to Ca 4(Si,Al) 12O 24(CO 3,SO 4)Arthur Thomas , Gemstones (2009)