UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
Uneven, Conchoidal, Uneven, Irregular, Conchoidal, Management Team (2012)
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.
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.