Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.69-2.723.19-3.56
1
7.18
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Fracture
Uneven, Conchoidal
Uneven, Conchoidal
Cleavage
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
{110} Perfect, {010} Indistinct
Mohs Hardness
6-6.55.5-6
2
10
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Chemical Composition
(Na,Ca)1-2Si3-2O8
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)