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
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Conchoidal, Brittle
1.6 Cleavage
Good on {100} and {110}
{001} perfect; {111} imperfect, may exhibit parting on , {011}
1.7 Mohs Hardness
1.8 Chemical Composition
Na 2(Ti,Fe)Si 4(O,F) 11Ulrich Henn and Claudio C.
MgOMichael OâDonoghue , Gems, Sixth Edition (2006)