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<p>[QUOTE=&quot;Conder101, post: 1390703, member: 66&quot;]I&#039;ve known about that abstract for some time.&nbsp; But frankly I don&#039;t soak my copper coins in acetone for 18 hours.&nbsp; Typically I might swish them in the acetone for five seconds or so.&nbsp; So if it DID grow those crystals they would be about .007% the size of those.&nbsp; The ones in the abstract look to be less than .5 mm so the crystals I would get would be about .00004 mm&nbsp;&nbsp; or in inches .000002&nbsp; or about 2 millionths of an inch.&nbsp; Maybe I should get a scanning electron microscope and see if I can find them.</p><p><br /></p><p><br /></p><p>How long would there still BE acetone in that open petri dish left sitting out?&nbsp; I think during most of that overnight the coins was just left exposed to the ambient atmosphere.[/QUOTE]</p><p><br /></p>

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