Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.72-2.833.87-4.14
1
7.18
👆🏻
Fracture
Uneven
Subconchoidal, Conchoidal
Cleavage
Good on {100} and {110}
Poor on {120}, in traces on {001}
Mohs Hardness
6-75.5-6
2
10
👆🏻
Chemical Composition
Na 2(Ti,Fe)Si 4(O,F) 11Ulrich Henn and Claudio C.
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references