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
Splintery, UnevenArthur Thomas, Difficult, Fibrous
Conchoidal, Conchoidal, Brittle
1.6 Cleavage
Good on [110]
Perfect on {001}, good on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
NaAlSi 2O 6Ulrich Henn and Claudio C.
KNa 4Ca 4Si 8O 18(CO 3) 4(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)