Tenacity
-
Brittle
Solubility
insoluble in water
Dilute acid
Durability
-
-
Specific Gravity
3.62-3.872.93-2.96
1
7.18
👆🏻
Fracture
Conchoidal
Subconchoidal, Conchoidal
Cleavage
None
Distinct on {010}, imperfect {110} and {011}
Mohs Hardness
7-7.53.5-4
2
10
👆🏻
Chemical Composition
Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references