Tenacity
Brittle
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
1.9933.05-3.21
1
7.18
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Fracture
Uneven
Uneven, Subconchoidal, Splintery
Cleavage
Perfect on [100], [010], [001]
Good on {110}, poor on {100}
Mohs Hardness
2.57.5
2
10
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Chemical Composition
KCl
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references