Tenacity
-
Brittle
Solubility
-
Dilute acid
Durability
-
-
Specific Gravity
3.01-3.062.93-2.96
1
7.18
👆🏻
Fracture
Conchoidal
Subconchoidal, Conchoidal
Cleavage
Indiscernible
Distinct on {010}, imperfect {110} and {011}
Mohs Hardness
7-7.53.5-4
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.
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references