1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.7 Fracture
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Irregular
1.8 Cleavage
{0001} good, {10 1 0} parting
Perfect on {0001}
1.9 Mohs Hardness
1.13 Chemical Composition
(Ca,Ce)(Al,Ti,Mg)12O19
Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)