colemanite

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cole·man·ite

 (kōl′mə-nīt′)
n.
A natural white or colorless hydrated calcium borate, Ca2B6O11·5H2O, that is formed in conjunction with borax deposits and is a principal source of boric acid.

[After William Tell Coleman (1824-1893), American merchant in California.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

colemanite

(ˈkəʊlməˌnaɪt)
n
(Minerals) 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: Ca2B6O11.5H2O
[C19: named after William T. Coleman (1824–93), American pioneer, owner of the mine in which it was discovered]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

cole•man•ite

(ˈkoʊl məˌnaɪt)

n.
a mineral, hydrous calcium borate, Ca2B6O11∙5H2O, occurring in colorless or milky white crystals.
[1884; after W. T. Coleman of San Francisco, in whose mine it was found]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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Once rather grandly entitled The Coleman Daily Morning Gazette (she called it "the rag"), most Colemanites still referred to it as "The Daily," even though it had been published thrice-weekly (Monday-Thursday-Saturday) for at least a dozen years.
The important boron minerals of Turkey are tincal, colemanite and ulexite.
Piga, Arsenic Leaching by Na2S to Decontaminate Tailings Coming from Colemanite Processing, Miner Eng, 16 45 (2003).