Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.082.50
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, Conchoidal
Uneven, Conchoidal
Cleavage
Poor on {100}
Distinct on {100} and {110}
Mohs Hardness
55.5-6
2
10
👆🏻
Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)