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<p>[QUOTE=&quot;desertgem, post: 1876969, member: 15199&quot;]You can test for specific gravity without the necessary measurement of volume which can be difficult with good precision by using the formula.</p><p><br /></p><p>SG = <u> Weight of coin in air </u></p><p>&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; Weight of coin in air - weight of coin in water</p><p><br /></p><p>Here is a simple setup to do with a weight table in air, and one below the surface to get a quick specific gravity. The more precision your scale has, the higher precision ( accuracy ) of your SG measurement.</p><p><br /></p><p><a href="http://www.mineralab.com/Scale.htm" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.mineralab.com/Scale.htm" rel="nofollow">http://www.mineralab.com/Scale.htm</a>[/QUOTE]</p><p><br /></p>

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