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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.49-3.57
Subconchoidal, Uneven, Conchoidal
[001] Perfect
8
Al2SiO4(F,OH)2
 
-
-
-
3.20-3.50
Uneven, Conchoidal, Even
Perfect {010} imperfect {100}
6-7
Ca2Al3(SiO4)3(OH)