Tenacity
Brittle
-
Solubility
Poorly soluble in dilute HCl
-
Durability
-
-
Specific Gravity
2.80-2.954.28-4.42
1
7.18
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Fracture
Conchoidal
Conchoidal
Cleavage
Perfect on {10 1 1}, rhombohedral cleavage
Distinct on [010] and [100] poor on [101]
Mohs Hardness
3.5-45-5.5
2
10
👆🏻
Chemical Composition
CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)