Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.90-3.403.98-4.04
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann
Conchoidal
Cleavage
Indiscernible
Imperfect, poor one {100}
Mohs Hardness
7-7.54.5-5
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.
Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references