Tenacity
-
Brittle
Solubility
-
Dilute acid
Durability
-
-
Specific Gravity
2.08-2.162.93-2.96
1
7.18
👆🏻
Fracture
Irregular/uneven
Subconchoidal, Conchoidal
Cleavage
distinct/good on {1011}
Distinct on {010}, imperfect {110} and {011}
Mohs Hardness
4.53.5-4
2
10
👆🏻
Chemical Composition
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references