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<p>[QUOTE=&quot;GDJMSP, post: 1252597, member: 112&quot;]I think you must be mis-reading something. Nobody has said anything about casting (poured) coins, either silver or gold. And haymarks have nothing to do with the coin dies.</p><p><br /></p><p>What Prince is talking about is are the alloys themselves used to make the coin planchets.</p><p><br /></p><p>The explanation given for haymarks on the Heritage web site -</p><p>&nbsp;</p><p>&quot; <i>entirely normal black streaky flecks in the metal, sometimes called &quot;haymarks,&quot; caused by the alloyed silver containing tin, which came in part from Midlands and Welsh mines.&quot; </i></p><p><br /></p><p>- is completely wrong because it is impossible for that to happen. It is impossible for that to happen (as explained by Prince) because tin melts at a much lower temperature than silver and/or gold. And if tin melts at that lower temperature, then it is impossible for there to be flecks of tin gathered at the surface of the planchet and thus causing those black marks on the coin as the tin ages and tarnishes.</p><p><br /></p><p>You see, the explanation that is given on the Heritage site is assuming that those black marks on the coin are caused by clumps of tin that did not become mixed when the alloy was smelted. (It is the same explanation that is used to explain red spots on gold coins.) But that can&#039;t happen because of the melting point of tin.</p><p><br /></p><p>melting point of tin - 449.4 degrees F</p><p>melting point of silver - 1763.4 degrees F</p><p>melting point of gold - 1947.9 degrees F</p><p>melting point of copper - 1981.4 degrees F[/QUOTE]</p><p><br /></p>

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