Tenacity
Brittle
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
2.973.05-3.21
1
7.18
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Fracture
Uneven
Uneven, Subconchoidal, Splintery
Cleavage
None observed
Good on {110}, poor on {100}
Mohs Hardness
2.57.5
2
10
👆🏻
Chemical Composition
Na 3AlF 6Ulrich Henn and Claudio C.
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references