Gem, Rock, and Mineral Postage Stamps Featuring

Mineral Name: Colemanite
Composition: Hydrated calcium borate hydroxide
Nomenclature: Named after William Coleman, owner of the mine in which colemanite was discovered.
Industrial Uses: Ore of boron; source of borax.
Additional Notes: Colemanite is also known as borspar. The mineral neocolemanite, once thought to be a distinct mineral species, has been shown to be colemanite.

Turkey Scott 2115
Scott 2115
5 lira
17 Sep 1979

The stamp shows a natural, unpolished specimen. Philatelic Mineralogy Copyright © 1997-2010 by Richard Busch