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<p>[QUOTE=&quot;desertgem, post: 3936129, member: 15199&quot;]This from a chem site:</p><p>Ammonia solution is added to the precipitates. &lt;--coin instead</p><p><br /></p><p><br /></p><p><b>original precipitate</b> <b>observation</b></p><p><b>AgCl</b> precipitate dissolves to give a colourless solution</p><p><b>AgBr</b> precipitate is almost unchanged using dilute ammonia solution, but dissolves in concentrated ammonia solution to give a colourless solution</p><p><b>AgI</b> precipitate is insoluble in ammonia solution of any concentration</p><p><br /></p><p><br /></p><p>Best guess, but its bullion non the less.&nbsp; Use at own risk.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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