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
Conchoidal, Conchoidal, Brittle
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006)
1.6 Cleavage
Perfect on {001}, good on {110}
Not Available
1.7 Mohs Hardness
1.8 Chemical Composition
KNa 4Ca 4Si 8O 18(CO 3) 4(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
SiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)