Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.55-3.733.05-3.21
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven, Subconchoidal, Splintery
Cleavage
none
Good on {110}, poor on {100}
Mohs Hardness
7-7.57.5
2
10
👆🏻
Chemical Composition
Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references