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<p>[QUOTE=&quot;Marie Forjan, post: 420616, member: 147&quot;]Test the piece with the tooth tap using a known piece of plastic and a known piece of glass so you can compare. It really is a good test.</p><p><br /></p><p>However, I always wait until I get the item back home and can wash it first. At sales I have found tapping my wedding ring on an item helps me tell if a piece is stone/glass or plastic. Try doing that, again with known pieces of glass and plastic for comparison, you should be able to hear the difference <img src="styles/default/xenforo/smilies/smile.png" class="mceSmilie" alt=":)" unselectable="on" />[/QUOTE]</p><p><br /></p>

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