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<p>[QUOTE=&quot;cdb1950, post: 36502, member: 1735&quot;]So there are many environmental factors that can cause a coin to tone naturally.&nbsp; Paper composition, atmospheric conditions, original condition of the coin surface when toning commenced, PVC, stuff like that.&nbsp; What seperates an artificially toned coin from a naturally toned coin when the same processes are used for both?&nbsp; How can you decide which is accidental (natural) and intentional (artificial) when identical chemical reactions take place?&nbsp; Would it be natural toning if you unknowingly stored your coins in a holder that chemically reacted with the coins surface to produce toning, but artificial toning if you intentionally did the same thing?&nbsp; Seems that would boil down to what was the intent when the coin was stored.&nbsp; Is that the only difference?</p><p><br /></p><p>P.S.&nbsp; JD, GD, Great Pictures![/QUOTE]</p><p><br /></p>

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