1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Conchoidal, Conchoidal, Brittle
1.6 Cleavage
{0001} good, {10 1 0} parting
Perfect on {001}, good on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
(Ca,Ce)(Al,Ti,Mg)12O19
KNa 4Ca 4Si 8O 18(CO 3) 4(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)