benitoite

noun

be·​ni·​to·​ite

bə-ˈnē-tə-ˌwīt,

-ˌtō-ˌīt

plural -s

: a mineral BaTiSi₃O₉ consisting of sapphire-blue crystallized barium titanosilicate sometimes used as a gem

Word History

Etymology

San Benito county, California + English -ite

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