Tenacity
Brittle
-
Solubility
Poorly soluble in dilute HCl
-
Durability
-
-
Specific Gravity
2.80-2.953.12
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Perfect on {10 1 1}, rhombohedral cleavage
None
Mohs Hardness
3.5-4-9999
2
10
👆🏻
Chemical Composition
CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 9(Mg,Fe2+ )(PO 4) 6(PO 3OH)Anthony et al , Handbook of mineralogy (2001)