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<p>[QUOTE=&quot;drg642, post: 10060961, member: 74&quot;]Thanks AJ.</p><p><br /></p><p>You can see under magnification the base metal of the spot where I rubbed on the stone to test, and other high points that have worn through over time. These are coppery/gold in color, and none of the wear through spots test for silver.&nbsp; The testing I did is classic gold filled, with both 9k acid and 10 acid doing a slow fade to completely dissolve the line on the testing stone.&nbsp; I&#039;ve just never seen gold filled tarnish to black, and then clean up.&nbsp; I will probably take this to get XRF tested the next time I go to my scrap metal place, and see what it comes up.&nbsp; I&#039;ll report back.[/QUOTE]</p><p><br /></p>

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