The Collaborative International Dictionary
Colemanite \Cole"man*ite\, n. [From W.T. Coleman of San Francisco.] (Min.) A hydrous borate of lime occurring in transparent colorless or white crystals, also massive, in Southern California.
Wiktionary
n. (context mineral English) A white, grey or colorless mineral form of calcium borate; a principal source of boron.
Wikipedia
Colemanite (CaBO(OH)·HO) is a borate mineral found in evaporite deposits of alkaline lacustrine environments. Colemanite is a secondary mineral that forms by alteration of borax and ulexite.
It was first described in 1884 for an occurrence near Furnace Creek in Death Valley and was named after William Tell Coleman (1824–1893), owner of the mine Harmony Borax Works where it was first found. At the time, Coleman had alternatively proposed the name "smithite" instead after his business associate Francis Marion Smith.
Usage examples of "colemanite".
These include the tungsten-bearing scheelite, halite, calcite, hydrozincite, types of borax, colemanite and many others.