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Toned Platinum Coins/Bullion

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United States
306 Posts
 Posted 03/04/2012  11:51 am Show Profile   Bookmark this topic Add VetStudent to your friends list Get a Link to this Message Number of Subscribers
I know that platinum is not supposed to tone, but that it doesn't mean that it can't.

Does anybody own any platinum that has a desirable toning?

Please post pics if you do and would like to share!
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Ed_B's Avatar
United States
4008 Posts
 Posted 03/06/2012  12:10 am  Show Profile   Bookmark this reply Add Ed_B to your friends list Get a Link to this Reply
Unlike Ag, Pt does not react with O2 except under extreme conditions that are unlikely to be found outside a lab... oxygen furnace + 2500-3000F, etc. Pt is definitely a "noble metal" and resists forming compounds except in extreme chemical and physical environments. It is unlikely that anyone has "toned" Pt just laying around. Dirty or stained, perhaps, but not toned as we tend to think of coins toning.
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biokemist6's Avatar
United States
12437 Posts
 Posted 03/06/2012  12:50 am  Show Profile   Bookmark this reply Add biokemist6 to your friends list Get a Link to this Reply

Platinum will not tone under normal conditions, you would have to subject it to some pretty extreme environments to even have a chance of toning it.
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SilverBug's Avatar
Canada
862 Posts
 Posted 03/06/2012  01:06 am  Show Profile   Bookmark this reply Add SilverBug to your friends list Get a Link to this Reply
it could be just dirt on the pt. here is what I heard that you can do to platinum or gold: you burn it. after the dirty stuff burn out, your platinum or gold will shine like new
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Ed_B's Avatar
United States
4008 Posts
 Posted 03/06/2012  6:45 pm  Show Profile   Bookmark this reply Add Ed_B to your friends list Get a Link to this Reply
Yes, you could do that. A natural gas and air flame, such as from a Bunsen burner, should be good for that. That should "cook off" just about any dirt or oil on the coin and leave it very clean. This would have to be done VERY carefully, though, so as to not damage the coin by careless handling. Pt coins tend to be expensive items, so it would probably be best to minimize handling and cleaning. Perhaps a very gentle rub with a cotton ball and some isopropanol would be sufficient for removing any dirt or oil from the coin without causing damage to it.
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