Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.08-2.163.87-4.14
1
7.18
👆🏻
Fracture
Irregular/uneven
Subconchoidal, Conchoidal
Cleavage
distinct/good on {1011}
Poor on {120}, in traces on {001}
Mohs Hardness
4.55.5-6
2
10
👆🏻
Chemical Composition
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references