Tenacity
Brittle
Brittle
Solubility
-
Gelatinises in acids
Durability
-
-
Specific Gravity
3.87-4.142.4-2.5
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Uneven, Conchoidal
Cleavage
Poor on {120}, in traces on {001}
Distinct on {110}
Mohs Hardness
5.5-65-6
2
10
👆🏻
Chemical Composition
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2