Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.19-3.563.21-3.38
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Irregular/uneven, Uneven
Cleavage
{110} Perfect, {010} Indistinct
Perfect on {001}
Mohs Hardness
5.5-66-7
2
10
👆🏻
Chemical Composition
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
Ca 2Al 3(SiO 4) 3(OH)Walter Schumann , Gemstones of the world (2001) More from other references