My feeling is that beads that have been worn over a long period of time, will reflect that in the condition of the surface and the wear of the perforation. However, beads that have been buried for thousands of years and have not been worn much will have an 'newer' appearance. I have seen this in trade beads and ancient stone beads. Also beads that have only been worn for important ceremonies will not show a worn surface. It's not a simple thing. Personally I have to have the beads in my hands before I can form an opinion.