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<p>[QUOTE=&quot;desertgem, post: 655737, member: 15199&quot;]If you know any college or high school science teacher they can do a specific gravity/density test. SInce gold has a density of 19.3 gr/cc, a 200 gram bar of 100% gold should have a volume of 10.52 cubic centimeters or 10.52 ml of water displacement.&nbsp; 75% gold (18 karat) should be about 12.6 ml displacement. If you have a syringe ( no needle needed,maybe from animal supply) that accurately measures ml, I can tell you how to do yourself, but chem lab equipment will be better.</p><p><br /></p><p>Notice from the chart below, 100% copper would be almost twice the size at 22.2 ml displacement.</p><p><br /></p><p>Jim</p><p><br /></p><p><br /></p><p><b>Metal</b><b>Density </b> </p><p>Gold19.3&nbsp; </p><p>Silver10.5&nbsp; </p><p>Platinum21.4&nbsp; </p><p>Palladium12.0&nbsp; </p><p>Copper9.0&nbsp; </p><p>9ct10.9 to 12.7&nbsp; </p><p>14ct12.9 to 14.6&nbsp; </p><p>18ct Yellow15.2 to 15.9&nbsp; </p><p>18ct White14.7 to 16.9&nbsp; </p><p>22ct17.7 to 17.8 </p><p>&nbsp;Sterling Silver10.2 to 10.3&nbsp; 950 </p><p>Platinum20.1[/QUOTE]</p><p><br /></p>

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