I've seen chips that have been advertised on Ebay as SU condition and the edges look round as a river rock. The below chips listed are great looking, all stand on edge. I don't like to use the word SU because for some people take an artistic license with that word.

Great Chips - MGM Chips Uncirculated off the tables when put out, Sand's Chip is in Great Condition, little or no use. London Club is in great condition also, probably little or no use. Take a look now and see the difference.

http://search.ebay.com/_W0QQsassZmwp7777

There is a difference!
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Bid with Confidence! mwp7777 on Ebay!