colemanite

[ kohl-muh-nahyt ]

Phonetic (Standard)IPA

noun

a mineral, hydrous calcium borate, Ca 2 B 6 O 11 ⋅5H 2 O, occurring in colorless or milky-white crystals.

colemanite

/ ˈkəʊlməˌnaɪt /

a colourless or white glassy mineral consisting of hydrated calcium borate in monoclinic crystalline form. It occurs with and is a source of borax. Formula: Ca 2 B 6 O 11 .5H 2 O

Named in 1884 after W. T. Coleman of San Francisco, in whose mine it was found; -ite ¹

C19: named after William T. Coleman (1824–93), American pioneer, owner of the mine in which it was discovered

The salts contained in these deposits are mainly borax, ulexite, and colemanite.

The colemanite occurs in irregular milky-white layers or nodules, mingled with more or less gypsum.

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