1 Physical Properties
1.1 Tenacity
1.2 Solubility
Readily soluble in water
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, Conchoidal, Brittle
Brittle, Metallic, Brittle, Metallic
1.6 Cleavage
Good on {0001}
{110} Perfect, {010} Perfect
1.8 Mohs Hardness
1.13 Chemical Composition
KNa22(SO4)9(CO3)2Cl
Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)