Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.505.00-5.30
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Distinct on {100} and {110}
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
5.5-66
2
10
👆🏻
Chemical Composition
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)
Fe 2O 3Arthur Thomas , Gemstones (2009)