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
Uneven, Uneven, Gems, Sixth Edition (2006)
1.6 Cleavage
Perfect on {001}, good on {110}
{001} Perfect, {010} Good
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)
KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)