Uneven, Conchoidal, Uneven, Irregular, Conchoidal, Management Team (2012)
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, 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.
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)