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ALUMINUM PENNY 1974 vs. NON-COPPER PENNY 1972-Denver Mint
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<p>[QUOTE="Conder101, post: 2149896, member: 66"]No there weren't</p><p><br /></p><p><br /></p><p>Except an nickel or coppernickel planchet of 19 mm and equal thickness would also weigh 3.1 grams (Density of copper and nickel are almost identical). That's why I search the specs on coins we made for other countries to see if there was a match. And as I said there was one. The Nepal 25 Pice is coppernickel, 19mm, and 3.1 grams. But it is not magnetic, and was only struck in San Francisco as a proof coin.</p><p><br /></p><p><br /></p><p>Few coin dealers know much about errors unless they have a special interest in them.</p><p><br /></p><p><br /></p><p>Not always true.</p><p><br /></p><p><br /></p><p>Not even close, lead weighs only a little more than half what gold weighs. Gold and tungsten are almost identical in weight but different in color. Lead and silver are much closer than lead and gold.</p><p><br /></p><p><br /></p><p>Yes, Nickel. Almost identical in weight and highly magnetic in it's pure form, but loses it's magnetic properties if it contains more than about 8% or other metal.[/QUOTE]</p><p><br /></p>
[QUOTE="Conder101, post: 2149896, member: 66"]No there weren't Except an nickel or coppernickel planchet of 19 mm and equal thickness would also weigh 3.1 grams (Density of copper and nickel are almost identical). That's why I search the specs on coins we made for other countries to see if there was a match. And as I said there was one. The Nepal 25 Pice is coppernickel, 19mm, and 3.1 grams. But it is not magnetic, and was only struck in San Francisco as a proof coin. Few coin dealers know much about errors unless they have a special interest in them. Not always true. Not even close, lead weighs only a little more than half what gold weighs. Gold and tungsten are almost identical in weight but different in color. Lead and silver are much closer than lead and gold. Yes, Nickel. Almost identical in weight and highly magnetic in it's pure form, but loses it's magnetic properties if it contains more than about 8% or other metal.[/QUOTE]
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