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<p>[QUOTE=&quot;Conder101, post: 907732, member: 66&quot;]The thickness of a struck coin is dependent of the quality of the striking.&nbsp; The better the strike the more fully the rims are struck up and the thicker the edge.&nbsp; Proofs are struck TWICE at a higher pressure than the business strikes which are only struck once, so the rims are very high, fully struck and squared off.&nbsp; The silver composition is also softer than the coppernickel clad so it strikes up better.&nbsp; For this reason they seem to be thicker than the business strikes.&nbsp; </p><p><br /></p><p><br /></p><p>That has nothing to do with the thickness though.&nbsp; The planchets for both are the same diameter and thickness before they are struck.&nbsp; The silver proofs are 10% heavier because silver is denser than copper or nickel.[/QUOTE]</p><p><br /></p>

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