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<p>[QUOTE=&quot;mlov43, post: 2006548, member: 16729&quot;]Nice link. </p><p><br /></p><p>So, this is what I&#039;d like to know:&nbsp; There is a &quot;bronze&quot; (so called) variety of a certain coin that has an <u>88% Copper, 12% Zinc composition</u>, and coin made the same year with a (so-called &quot;brass&quot;) <u>65% Copper, 35% Zinc composition</u> (the mint changed metal ratios due to increases in copper prices that year).&nbsp; Could <b>specific gravity</b> tell me the difference between the two varieties?</p><p><br /></p><p>What would a person need to know about attempting to do this?[/QUOTE]</p><p><br /></p>

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