Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.642.78
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Uneven, Conchoidal
Cleavage
Absent
{???} Distinct, {???} Indistinct
Mohs Hardness
6.5-75-6
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
3CaAl 2Si 2O 8 · CaCO 3Anthony et al , Handbook of mineralogy (2001)