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<p>[QUOTE=&quot;Conder101, post: 1375124, member: 66&quot;]Unfortunately the weight and specific gravity will probably not help you much.&nbsp; Copper and nickel have almost identical specific gravity and therefor weight.&nbsp; (Copper SG is 8.96, nickel is 8.90)&nbsp; Then there is the question of what the exact composition of the alloys are.&nbsp; But for example in US coins the early copper coin had an SG of 8.96, the post 1864 cents (bronze) were 8.84, the brass 1963-1982 were 8.83.&nbsp; The copper nickel cents (88% copper 12% nickel) were 8.92 and the 75%copper 25% nickel five cent pieces are also 8.92</p><p><br /></p><p>Obviously with SG&#039;s so similar, two blanks of the same size but different alloys will have the same weight to within the allowed mint tolerance.</p><p><br /></p><p><br /></p><p>Not as long as they are completely dried afterward.....unless you manage to find some coins made of sodium.[/QUOTE]</p><p><br /></p>

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