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<p>[QUOTE=&quot;Conder101, post: 718289, member: 66&quot;]It is not possible to tell a brass and a bronze coin apart by a visual inspection.&nbsp; Especially when you do not know the metal ratios used in the alloy.&nbsp; How much zinc is in the brass coin?&nbsp; I&#039;ve never seen an exact alloy listing for that coin.&nbsp;&nbsp; People tend to think of brass as having a yellow color.&nbsp; That is true, if you have about 20% zinc in the alloy.&nbsp; But a brass coin with 5% zinc is visually indistinguishable for a bronze coin that is copper and 5% tin,&nbsp; Compare a 1961 Lincoln cent witha 1962 Lincoln cent.&nbsp; Can you see a difference in the metal? Probably not, but the 61 is bronze and the 62 is brass.&nbsp; And if the two metals are cleaned they are even harder to tell apart.</p><p><br /></p><p>The only way to tell the two apart is to bombard the metal with x-rays or neutrons and study the reemissions to determint what metals are present and in what ratios.[/QUOTE]</p><p><br /></p>

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