Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.24-2.292.60-2.64
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Conchoidal
Uneven, Splintery, Conchoidal
Cleavage
Very poor [100]
Absent
Mohs Hardness
5-5.56.5-7
2
10
👆🏻
Chemical Composition
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
SiO 2Arthur Thomas , Gemstones (2009)