DUPLEXITE

ˈd(y)üˌplekˌsīt noun

( -s )

Etymology: S. Duplex, 20th century Australian quarry manager who found it + English -ite

: a mineral perhaps Be 4 Ca 6 Al 2 Si 14 O 41 .2H 2 O consisting of hydrous beryllium calcium aluminosilicate