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<p>[QUOTE=&quot;desertgem, post: 3441326, member: 15199&quot;]Not really, unless your tap water is a red brown stream of water you wouldn&#039;t drink. Some have a lot of dissolved minerals , but my Colorado river ( near the end) has it filtered and treated and the yearly report by the city is very good. Fresh out of the ground water is heavily loaded with minerals. I suppose it makes some sense that the coins have been in the ground and the reactions occurred between the coin and the soil chemicals with water as the reactant solution. In water for a few minutes, yes, but not long enough to start reactions. Almost all organic based oils are possible reactants over time. I very seldom use oil, but I use &#039;synthetic&nbsp; clock oil&quot; I have for my clock collection, never any reaction , but expensive as most clock stuff is. IMO,Jim[/QUOTE]</p><p><br /></p>

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