Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.60-3.613.01-3.06
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
Imperfect/fair/absent
Indiscernible
Mohs Hardness
8-8.57-7.5
2
10
👆🏻
Chemical Composition
Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) 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.