Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.90-3.403.05-3.08
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann
Subconchoidal, Uneven, Conchoidal
Cleavage
Indiscernible
Poor on {100}
Mohs Hardness
7-7.55
2
10
👆🏻
Chemical Composition
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.
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)