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<p>[QUOTE=&quot;Curioser, post: 10507731, member: 13823&quot;]Perhaps there are two different materials but I doubt it.&nbsp; The portrait does not have a perfectly flat background yet it sits perfectly on the background. I have tested the materials with a Presidium gem tester.&nbsp; The background tests in the chalcedony range and the portrait in the quartz range.&nbsp; Both test above glass.[/QUOTE]</p><p><br /></p>

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