Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.643.84
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Subconchoidal, Conchoidal
Cleavage
Absent
{0001} good, {10 1 0} parting
Mohs Hardness
6.5-77.5-8
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
(Ca,Ce)(Al,Ti,Mg)12O19