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<p>[QUOTE=&quot;evelyb30, post: 246379, member: 36&quot;]I the books but not the tester.&nbsp; A lot of gemstones you can just eyeball, but some can be synthetic or outright fakes.&nbsp; If you know how to &quot;look&quot;, sterling acid isn&#039;t strictly necessary; the 18k solution will also test for sterling.&nbsp; When scratched on a stone and hit with the acid, silver will turn white/gray and &quot;curdle&quot; up.&nbsp; Silver acids go bad quickly, so having a backup is a good idea.&nbsp; </p><p><br /></p><p>And if you do run into a conundrum, post away and the boardies will figure it out as often as not.[/QUOTE]</p><p><br /></p>

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