Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.842.60-2.64
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Uneven, Splintery, Conchoidal
Cleavage
{0001} good, {10 1 0} parting
Absent
Mohs Hardness
7.5-86.5-7
2
10
👆🏻
Chemical Composition
(Ca,Ce)(Al,Ti,Mg)12O19
SiO 2Arthur Thomas , Gemstones (2009)