Tenacity
-
Brittle
Solubility
insoluble in water
-
Durability
-
-
Specific Gravity
3.62-3.873.87-4.14
1
7.18
👆🏻
Fracture
Conchoidal
Subconchoidal, Conchoidal
Cleavage
None
Poor on {120}, in traces on {001}
Mohs Hardness
7-7.55.5-6
2
10
👆🏻
Chemical Composition
Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references