Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
Ca 3Ti4+2(Fe3+2Si)O 12Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Distinct on {100} and {110}
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)