Tenacity
Brittle
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.503.25-3.35
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Conchoidal, ConchoidalWalter Schumann
Cleavage
Distinct on {100} and {110}
Perfect in three directions
Mohs Hardness
5.5-65
2
10
👆🏻
Chemical Composition
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references