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<p>[QUOTE=&quot;Lolli, post: 4203246, member: 96900&quot;]One huge problem of gold fourrees is that specific weight of gold is 19.3 grams per cubic centimeter and of copper 8.9 grams.</p><p><br /></p><p>The forgers can achieve that the fourrees with copper core have same weight as offical coins from pure gold but then this fouree will have a much huger size or a much thicker planchet, because copper is much lighter than gold!</p><p><br /></p><p>If they want the fourrees to have same size and thickness of planchet like real offical coins from pure gold, than the weight of the fourre will be much lighter because gold is much heavier than copper.</p><p><br /></p><p>The specific weight of gold is 19.3 grams per cubic centimeter; it is the sixth heaviest metal. For comparison: lead weighs 11.4 grams per cubic centimeter, iron 7.9 grams and copper 8.9 grams.</p><p><br /></p><p>If the coin like here weighs much more than it should it would mean that the planchet must be extremely thick that it would have been very obvious to anyone in the past that the coin must be fake. If you place it next to a real offical coin you would have noticed it immedialtely or anyone who every handles a real one must have noticed. So to mix it with real coins would make the problems even more obvious because you will then have real coins for comparison.</p><p>Making the coin heavier means to make the planchet even thicker and so to make the fouree even more obvious. Not sure if people were really that stupid in the past.</p><p>I think best way was to make the fourre a little bit lighter and the planchet thicker, that the fourre will not be noticed that easily.[/QUOTE]</p><p><br /></p>

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