Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.55-3.733.87-4.14
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Subconchoidal, Conchoidal
Cleavage
none
Poor on {120}, in traces on {001}
Mohs Hardness
7-7.55.5-6
2
10
👆🏻
Chemical Composition
Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references