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<p>[QUOTE=&quot;red_spork, post: 2482340, member: 74282&quot;]As Alegandron said, BD is powdery or flakey and easily comes off when scratched with something soft like a wooden toothpick or a rose thorn. Not everything that is green is bronze disease, and even bright green is a common patina color on bronze, so you have to be careful not to make the mistake many new collectors make and go trying to remove green patina that is stable. Really the most basic definition of bronze disease is that it isn&#039;t stable, the coin is actually changing and being corroded from it.</p><p><br /></p><p>That said, if there&#039;s some green that wasn&#039;t there before, that is worrying. Got pictures? Preferably, before and after.[/QUOTE]</p><p><br /></p>

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