Tenacity
Brittle
Brittle
Solubility
Poorly soluble in dilute HCl
-
Durability
-
-
Specific Gravity
2.80-2.952.45-2.50
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
Perfect on {10 1 1}, rhombohedral cleavage
Poor on {110}
Mohs Hardness
3.5-45.5-6
2
10
👆🏻
Chemical Composition
CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KAlSi 2O 6Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references