Iridescence in Seashell
By Andrew Alden, About.com Guide
A sidewalk at Venice Beach, California, beautifies its concrete with orange agate and iridescent bits of mother-of-pearl. Another iridescent mineral is bornite.
(c) 2007 Andrew Alden, licensed to About.com
©2010 About.com, a part of The New York Times Company.
All rights reserved.