Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
4.95-5.03.25-3.35
1
7.18
👆🏻
Fracture
Uneven
Conchoidal, ConchoidalWalter Schumann
Cleavage
Imperfect to indistinct on {10 1 0}, parting on {0001}
Perfect in three directions
Mohs Hardness
4-55
2
10
👆🏻
Chemical Composition
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references