Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.24-2.292.90-3.40
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Conchoidal
Uneven, ConchoidalWalter Schumann
Cleavage
Very poor [100]
Indiscernible
Mohs Hardness
5-5.57-7.5
2
10
👆🏻
Chemical Composition
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.