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<p>[QUOTE=&quot;johnmilton, post: 13795431, member: 101855&quot;]I vote “natural.” That’s one of the ways the toning got there on the pieces that are natural. Storing the coin in an envelope made of paper with sulfur in it is another. These methods almost always take time. I’ve had the envelope method take a few years. One would also have to be super intuitive or psychic to say it isn’t “natural.” </p><p><br /></p><p>The artificial toning usually involves heat and might come out of a bottle. The results can be unpredictable, disappointing and detectable. </p><p><br /></p><p>The caveat is if the piece is hairlined or otherwise damaged from improper cleaning. In that case toning will only coverup the problem, not fix it.[/QUOTE]</p><p><br /></p>

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