Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.793.87-4.14
1
7.18
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Fracture
-
Subconchoidal, Conchoidal
Cleavage
{100} and {010} perfect
Poor on {120}, in traces on {001}
Mohs Hardness
65.5-6
2
10
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Chemical Composition
LiNa(Zr,Ti,Hf)Si 6O 15Ulrich Henn and Claudio C.
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references