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<p>[QUOTE=&quot;Michael K, post: 3175566, member: 78298&quot;]Because it&#039;s not copper on both sides, that&#039;s rust, environmental damage.</p><p>If it was missing both clad layers it would be incredibly thin and light. 3g or less.</p><p>As for the 5.3g quarter, it&#039;s a little light, a little below tolerance, but that can happen several ways. Circulation wear can take a little weight off. Acid or other factors will eat some of the metal away.</p><p>Sometimes the planchet (the blank the coin is minted on) can be rolled a little thin,</p><p>and weigh a little less. That would be an error, but I don&#039;t think your coin has that.</p><p>It&#039;s probably just a form of damage, which is the most common reason for any of this.</p><p><br /></p><p>As for the clad layers, the coin has a copper core and it is sandwiched by clad layers, made of copper and nickel (the silvery color on both sides).</p><p>Your coin is just environmentally damaged. Water, air, soil, pollutants all of these things will make the silvery color get that dirty color, especially if it has been in the ground for a little while. It&#039;s not copper,</p><p>which has a very distinct bright copper color.[/QUOTE]</p><p><br /></p>

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