Gem, Rock, and Mineral Postage Stamps Featuring

Mineral Name: Brookite
Composition: Titanium oxide
Nomenclature: Named after the English mineralogist, Henry James Brucke.
Industrial Uses: Ore of titanium.
Additional Notes: Brookite is a polymorph with two other minerals, anatase and rutile. Polymorphs (a term that means "multiple forms") are minerals that have the same chemical composition—titanium oxide in the case of anatase, brookite, and rutile—but have different crystallographic structures.

Monaco Scott 1727
Scott 1727
4.00 francs
4 Sep 1990

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