Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.87-4.143.1-3.5
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Granular
Cleavage
Poor on {120}, in traces on {001}
None
Mohs Hardness
5.5-65-6
2
10
👆🏻
Chemical Composition
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2(Mg,Fe)Al 2(SiO 4)(Si 2O 7)(OH) 2 · H 2O)Arthur Thomas , Gemstones (2009)