Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.643.05-3.08
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Uneven, Irregular, Conchoidal
Cleavage
Absent
None
Mohs Hardness
6.5-76.5
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
Ca 3Al 2(SiO 4) 3-x(OH) 4x (x=0.2 to 1.5)Anthony et al , Handbook of mineralogy (2001)