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Platinum Coin!

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United States
451 Posts
 Posted 11/19/2010  10:39 pm Show Profile   Bookmark this topic Add brokencompass to your friends list Get a Link to this Message Number of Subscribers
I was surprised to see a platinum coin issued in the early 19th century! Didn't know they had technology so many years ago to melt platinum!

http://www.sixbid.com/nav.php?p=vie...200&lot=1285

Wow! That is quite a coin!
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vermontensium's Avatar
United States
16679 Posts
 Posted 11/19/2010  10:47 pm  Show Profile   Check vermontensium's eBay Listings Check vermontensium's eCrater Listings Bookmark this reply Add vermontensium to your friends list Get a Link to this Reply
Nice coin!
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carmykle's Avatar
United States
2448 Posts
 Posted 11/19/2010  11:22 pm  Show Profile   Bookmark this reply Add carmykle to your friends list Get a Link to this Reply
I thought Pt was a relatively new metal but I was wrong. First discovered in 1755 by south American Indians and then found in sand deposits in the Ural Mountains. How quickly we forget.
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Sap's Avatar
Australia
16826 Posts
 Posted 11/20/2010  04:26 am  Show Profile   Bookmark this reply Add Sap to your friends list Get a Link to this Reply
The Russian Empire had a whole riverful of the stuff, and no other practical use to put it to. I guess they thought they might as well make coins out of it. Apparently they made buttons and other trinkets out of it, too.

Quote:
Didn't know they had technology so many years ago to melt platinum!

They didn't. While platinum has a melting point too high (1756 degrees C) for anything but modern technology to melt, platinum can be cold-compressed relatively easily. Since most contaminants in platinum have a lower melting point than it, raw platinum can be refined simply by getting it as hot as possible; the platinum just sits there while everything else melts or evaporates away. The resulting "sponge" can then be compressed into sheets of pure metal, then cut into coin blanks.

Russia is the only country to have ever issued circulating platinum coinage. While the 6 and 12 rouble pieces were more for show, the 3 roubles were made in sufficient quantity to be a practical part of the economy. They were also restruck at later dates in unknown quantities for the collections of Russian nobility.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
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xiang's Avatar
Malaysia
59 Posts
 Posted 12/01/2010  12:27 pm  Show Profile   Bookmark this reply Add xiang to your friends list Get a Link to this Reply
YEA this is cool man...new discovery
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DVCollector's Avatar
United States
10045 Posts
 Posted 12/01/2010  2:24 pm  Show Profile   Bookmark this reply Add DVCollector to your friends list Get a Link to this Reply
Look at those planchet defects on that coin linked above. Obviously, they had difficulty refining/rolling out the platinum.

I'll never forget a story a dealer friend told me, of a group of "white metal" Russian coins being auctioned--and somebody getting an incredible deal because the auction house did was not aware of platinum coins.
Edited by DVCollector
12/01/2010 4:02 pm
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Australia
3831 Posts
 Posted 12/04/2010  10:55 pm  Show Profile   Bookmark this reply Add gxseries to your friends list Get a Link to this Reply
These Russian platinum coins, while they are struck in almost pure platinum actually have traces of iron, nickel and other impurities. Because there are a fair number of restrikes or even counterfeits, tests now have gone down to mass spectrometry. Interesting of what kind of traces they found to be honest. I missed too many chances of getting an example at 300USD. Now it's at least 5 times of that... I only have a modern USSR platinum coin.
My partial coin collection http://www.omnicoin.com/collection/gxseries
My numismatics articles and collection: http://www.gxseries.com/numis/numis_index.htm
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