Tenacity
Brittle
-
Solubility
Slowly dissolves in water
-
Durability
-
-
Specific Gravity
-99993.05-3.21
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Subconchoidal, Splintery
Cleavage
None
Good on {110}, poor on {100}
Mohs Hardness
3.5-47.5
2
10
👆🏻
Chemical Composition
K2Mg2(SO4)3
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references