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<p>[QUOTE=&quot;stracci, post: 1578385, member: 13814&quot;]I scratched under one cup with the tip of a stainless steel knife. It took a small scratch into the stone. For comparison, I also tried to scratch several of my jadeite bangles, and the knife tip couldn&#039;t scratch them at all. Ha! So maybe they are some other stone, like you say. </p><p>I will try this test on the underside of a confirmed nephrite piece when I get home later, to see what happens.[/QUOTE]</p><p><br /></p>

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