Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.95-5.02.60-3.02
1
7.18
👆🏻
Fracture
Uneven
-
Cleavage
Imperfect to indistinct on {10 1 0}, parting on {0001}
Perfect
Mohs Hardness
4-5-9999
2
10
👆🏻
Chemical Composition
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe2+ ) 5Al(Si 3Al)O 10(OH) 8Anthony et al , Handbook of mineralogy (2001)