Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
Na 2[Al 2Si 3O 10] · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
{???} Distinct, {???} Distinct, {???} Distinct
LiFe3+ (PO 4)(OH)Anthony et al , Handbook of mineralogy (2001)