colemanite

noun
cole·man·ite | \ ˈkōl-mə-ˌnīt \

Definition of colemanite 

: a colorless or white mineral consisting of a hydrous calcium borate occurring in monoclinic crystals

First Known Use of colemanite

1884, in the meaning defined above

History and Etymology for colemanite

William T. Coleman †1893 American businessman and mine owner

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The first known use of colemanite was in 1884

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