Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.90-3.402.82
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann
-
Cleavage
Indiscernible
Perfect in one direction, indistinct in one direction
Mohs Hardness
7-7.56
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.
K2Na(Ca,Mn)2Ti[O|Si7O18(OH)]