Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.08-2.163.05-3.21
1
7.18
👆🏻
Fracture
Irregular/uneven
Uneven, Subconchoidal, Splintery
Cleavage
distinct/good on {1011}
Good on {110}, poor on {100}
Mohs Hardness
4.57.5
2
10
👆🏻
Chemical Composition
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references