Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.28-4.424.95-5.0
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Distinct on [010] and [100] poor on [101]
Imperfect to indistinct on {10 1 0}, parting on {0001}
Mohs Hardness
5-5.54-5
2
10
👆🏻
Chemical Composition
PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references