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Post Your Unusual Composition Coins

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X2an's Avatar
Sweden
1078 Posts
 Posted 12/12/2015  5:41 pm  Show Profile   Bookmark this reply Add X2an to your friends list Get a Link to this Reply
I should add that there are actual circulation coins made out of plastic, some Transnistrian coins since 2014. I wish I'd have some, but I don't. Here are numista's images of them:

Post-Your-Unusual-Composition-Coins Post-Your-Unusual-Composition-Coins
Post-Your-Unusual-Composition-Coins Post-Your-Unusual-Composition-Coins
Post-Your-Unusual-Composition-Coins Post-Your-Unusual-Composition-Coins
Post-Your-Unusual-Composition-Coins Post-Your-Unusual-Composition-Coins

Pretty ugly in my opinion. Low effort design combined with cheap material, but still interesting to have. I've got 1 and 10 ruble banknotes from this "country" but not these "coins".
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Numisma's Avatar
United States
4963 Posts
 Posted 12/12/2015  5:49 pm  Show Profile   Bookmark this reply Add Numisma to your friends list Get a Link to this Reply
I agree that they are not particularly lovely.

In response to the question about billon, here is what Wikipedia says:


Quote:
Billon ... is an alloy of a precious metal (most commonly silver, but also mercury) with a majority base metal content (such as copper).
The use of billon coins dates from ancient Greece and continued through the Middle Ages. During the 6th and 5th centuries BC, some cities on Lesbos Island used coins made of 60% copper and 40% silver. In both ancient times and the Middle Ages, leaner mixtures were adopted, with less than 2% silver content.
Edited by Numisma
12/12/2015 5:50 pm
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Steele's Avatar
United States
1119 Posts
 Posted 12/12/2015  9:14 pm  Show Profile   Bookmark this reply Add Steele to your friends list Get a Link to this Reply

Quote:
most commonly silver, but also mercury

Can anyone explain to me either how a coin can be made of mercury or how mercury is a precious metal?
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Steele's Avatar
United States
1119 Posts
 Posted 12/12/2015  9:25 pm  Show Profile   Bookmark this reply Add Steele to your friends list Get a Link to this Reply
I do see this: Beginning in 2006, Dave Hamric (Metallium) [5] has been attempting to strike "coins" (technically tokens or medals, about the size of a US cent) of every possible chemical element. To date he has struck tokens of the following elements, Mercury (sealed in resin cast)
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Numisma's Avatar
United States
4963 Posts
 Posted 12/12/2015  9:29 pm  Show Profile   Bookmark this reply Add Numisma to your friends list Get a Link to this Reply

Quote:

Quote:
most commonly silver, but also mercury


Can anyone explain to me either how a coin can be made of mercury or how mercury is a precious metal?


If mercury is alloyed with other metals, or if other metals are amalgamated in mercury, the resulting alloy will often be solid.
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Steele's Avatar
United States
1119 Posts
 Posted 12/12/2015  9:40 pm  Show Profile   Bookmark this reply Add Steele to your friends list Get a Link to this Reply
they may be solid but are they stable enough under normal atmospheric conditions to be used for coinage? and not be poisonous?
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Numisma's Avatar
United States
4963 Posts
 Posted 12/12/2015  9:47 pm  Show Profile   Bookmark this reply Add Numisma to your friends list Get a Link to this Reply
Do you have a silver tooth? It's made of silver amalgam, which is a Ag/Hg alloy.
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jdmern's Avatar
United States
1949 Posts
 Posted 12/15/2015  5:04 pm  Show Profile   Bookmark this reply Add jdmern to your friends list Get a Link to this Reply
Here's another Notgeld piece, this one from Mainz



Post-Your-Unusual-Composition-Coins

Post-Your-Unusual-Composition-Coins

I guess you would consider composition to be brass, postage stamp, celluloid and whatever is in back of the stamp!
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Finn235's Avatar
United States
6130 Posts
 Posted 07/22/2016  4:32 pm  Show Profile   Bookmark this reply Add Finn235 to your friends list Get a Link to this Reply
Finally found one of these for a reasonable price:

Post-Your-Unusual-Composition-Coins Post-Your-Unusual-Composition-Coins

Clay sen issued by a private firm for a few weeks or days at the final moments of WWII.
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