Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.72-2.833.1-3.2
1
7.18
👆🏻
Fracture
Uneven
-
Cleavage
Good on {100} and {110}
Vitreous, pearly on cleavage
Mohs Hardness
6-73-4
2
10
👆🏻
Chemical Composition
Na 2(Ti,Fe)Si 4(O,F) 11Ulrich Henn and Claudio C.
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references