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<p>[QUOTE=&quot;SuperDave, post: 2412370, member: 1892&quot;]There aren&#039;t really &quot;hard and fast&quot; rules about how silver will acquire patina, since so much of that depends on the conditions under which it&#039;s stored and how the Mint prepared the planchets. If you look at a bunch at the Heritage Auctions archive, you&#039;ll see how (for instance) Bust Halves age in a different way than Seated coinage (which you&#039;ve accurately noted; Seated stuff gets <b>dark</b>) and both age differently than Morgans. As time goes by and you see increasing numbers of examples of the coins you like, you&#039;ll get a feel for what looks &quot;correct&quot; or not.</p><p><br /></p><p>Either way, silver is pretty reactive in atmosphere as long as there&#039;s something present with which it can react, and one would expect that to happen during the normal course of things.</p><p><br /></p><p>One generality that *does* work is, the longer you get from a coin&#039;s original minting date, the less-likely it will be to retain complete original &quot;as minted&quot; appearance. The laws of averages indicate that eventually it&#039;ll get into an atmosphere which will age it as it transitions through different owners. Morgans get a pass on this somewhat, as a large number of them survived to us in Mint bags (never leaving US Property) until the GSA sales. That said, it&#039;s been 40 years since those were released and even though our ability to preserve a coin in original condition has improved, it&#039;s not difficult to believe that a large plurality of them (I don&#039;t subscribe to &quot;predicted percentages&quot;) have been dipped back into &quot;clean&quot; shape.[/QUOTE]</p><p><br /></p>

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