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 .500 Fine Gold Coins - What's the alloy?		  Forum Locked
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Country
1000+ Penny Miser Member


USA
3121 Posts
Posted - 10/25/2009 :  20:22:16  Show Profile Send Country a Private Message
From 1974 onwards, many countries have had their gold coins minted with a .500 fineness of gold. Countries include: Bahamas, Barbados, Belize, Cayman Islands, Fiji, Turks&Caicos, and others. I know that these are 50% gold by weight and they all appear to have a mellowed golden tone.

What metals are in the composition of the alloy in the other 50%?
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The things that will destroy America are prosperity-at-any-price, peace-at-any-price, safety-first instead of duty-first, the love of soft living, and the get-rich-quick theory of life.
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zerocd
Penny Hoarding Member



555 Posts
Posted - 10/26/2009 :  12:57:27  Show Profile Send zerocd a Private Message
When gold is not 24k, I find it difficult to know for sure what the other part is. I had always understood it was silver but that must have been a childhood myth.

Please post links to whatever you find.

0CD
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Robarons
Penny Hoarding Member



USA
522 Posts
Posted - 10/26/2009 :  13:38:06  Show Profile Send Robarons a Private Message
I would say copper makes up a good part of the other metal.

Silver may be present, but it is found more in White Gold Rather than Yellow Gold.
Robber Baron= Robarons
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jadedragon
Administrator



Canada
3788 Posts
Posted - 10/27/2009 :  02:10:37  Show Profile Send jadedragon a Private Message
I like these research projects. It's fun to learn about coins and more importantly the events and items they depict, the metals they contain, the symbols and the history.

You must be logged in to see this link. about making golden coins with no gold (think $1 coins)
You must be logged in to see this link. interesting but not answering the question.


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"The basic gold alloys are: Red Gold - 90% gold and 10% copper; White Gold - 90% gold and 10% silver; Electrum - about 30% gold and 70% silver."

I also learned that countries use a wide variety of alloys which explains the various colors of gold coins we see.

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“The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.” – George Bernard Shaw.
Why Copper Bullion ~~~ Interview with Silver Bullion Producer Market Harmony
Passive Income blog
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Country
1000+ Penny Miser Member



USA
3121 Posts
Posted - 10/27/2009 :  07:29:34  Show Profile Send Country a Private Message
Thanks Jadedragon for doing all that research. While the .500 fineness gold alloy (12 carat) isn't enumerated, extrapolating from the gold alloys for 9 carat and 14 carat, the 12 carat alloy probably is composed of 4-10% silver, 31-45% copper, and around 7% zinc.
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The things that will destroy America are prosperity-at-any-price, peace-at-any-price, safety-first instead of duty-first, the love of soft living, and the get-rich-quick theory of life.
– Theodore Roosevelt
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moboman
1000+ Penny Miser Member



USA
2555 Posts
Posted - 10/28/2009 :  10:06:14  Show Profile Send moboman a Private Message
Wow thanks jadedragon, always looking to learn more.
"99% of all lawyers give the rest of them a bad name"


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