Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
4.95-5.02.98-3.03
1
7.18
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Fracture
Uneven
Uneven
Cleavage
Imperfect to indistinct on {10 1 0}, parting on {0001}
[110] perfect; [010] distinct
Mohs Hardness
4-55-6
2
10
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Chemical Composition
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.