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this article should have pictures because its hard to visualize how these pebbles are different form others without one. —Preceding unsigned comment added by 184.108.40.206 (talk) 03:48, 24 October 2007 (UTC)
I have not been able to find a picture that gives explicit permission for its use, however the external links lead to pictures GrassHopHer (talk) 17:34, 12 October 2013 (UTC)