Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.08-2.163.19-3.56
1
7.18
👆🏻
Fracture
Irregular/uneven
Uneven, Conchoidal
Cleavage
distinct/good on {1011}
{110} Perfect, {010} Indistinct
Mohs Hardness
4.55.5-6
2
10
👆🏻
Chemical Composition
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)