Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.24-2.292.74-2.76
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Conchoidal
Uneven
Cleavage
Very poor [100]
{010} Perfect, {001} Distinct
Mohs Hardness
5-5.53.5-4
2
10
👆🏻
Chemical Composition
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)