Uneven, Conchoidal, Uneven, Irregular, Conchoidal, Management Team (2012)
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
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.
(Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.