taaffeite

noun
taaffe·​ite | \ˈtäˌfīt\
plural -s

Definition of taaffeite 

: a rare mineral BeMgAl4O16 consisting of oxide of beryllium, magnesium, and aluminum and resembling mauve-colored spinel

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History and Etymology for taaffeite

Count Edward Charles Richard Taaffe, born 1898 Irish gemmologist born in Bohemia who first found it as a faceted gem + English -ite

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