Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
4.33-4.423.30-3.50
1
7.18
👆🏻
Fracture
-
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Perfect
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
4.55
2
10
👆🏻
Chemical Composition
Ca(Nd,Ce,La) 2(CO 3) 3F 2Ulrich Henn and Claudio C.
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references