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 Replies: 22 / Views: 3,631 |
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Moderator
 United States
188770 Posts |
 to the Community! |
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Pillar of the Community
United States
1311 Posts |
You got yourself a beautiful coin there, thanks for sharing & congrats!
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New Member
 Australia
45 Posts |
its awesome getting all of your opinions on it, here in australia not alot of people really deal in the pre 33 stuff. so I thought here would be the best place to ask :) I'm trying my best to get a little collection of the pre 33 stuff, it can be hard finding them here. Also I seen on the NGC website that the 1904 was highly counterfeit in real gold, so I started to doubt this coin, thats why I wanted to show you guys :)) lots of knowledgeable people here , which is great for newish guys like myself who love these old coins !
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Moderator
United States
96580 Posts |
that is a very nice coin, nice job.
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New Member
Australia
45 Posts |
thanks guys! so from your opinions safe to say ive got a genuine double eagle ! much appreciated :) being new to it all, I was worried it could of been a counterfeit made of real gold!
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New Member
Australia
45 Posts |
different xrf machine result  |
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Pillar of the Community
United States
3848 Posts |
Sweet, everything looks spot on! Congrats on the large gold coin! It is good that a local shop is able to XRF a coin for you, that is nice of them.
Suffering from bust half fever. Want to learn how to attribute early half dollars by die variety? Click Here: http://goccf.com/t/434955Shoot me a PM if you are looking to sell bust halves. |
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New Member
Australia
45 Posts |
Appreciate all the input guys!
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Bedrock of the Community
Australia
21788 Posts |
As an aside,
I bought a Double Eagle MS-61 in 2003 for US$ 395.
(Average inflation rate over the last 20 years according to the Australian Bureau of Statistics is 2.49%)
So, in theory, the coin should now have a value of about US $650.
So for lib9955:
Keep it for a few years, if you can.
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New Member
Australia
45 Posts |
It's definitely in the keeper stack !
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Pillar of the Community
Portugal
655 Posts |
What surprised me was the ruthenium in the coin. I knew platinum was a problem impurity in some gold mines in spanish america. Ruthenium is of the same group.
Is is a common impurity also in the gold used for coins?
Not saying I doubt the coin. I am just curious. I may try the gold shop with a friendly owner I have nearby and ask for a test on my eagles.
Edited by jecz79
04/18/2023 7:50 pm
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Bedrock of the Community
Australia
21788 Posts |
XRF hand held instruments are not as sensitively accurate as many may think.
I note that the acceptability range for the particular instrument used in this case is in the range of 89.8% to 90.21% for the gold readout.
That is OK, to my way of thinking.
Ru could well show up in the analysis, but hand held instruments may well detect any element but the accuracy for some hand helds could well be in the range of about 0.2% to 0.4%, and still be acceptable for that particular instrument.
The other factor is to what degree of purity the refiners (or the MInt) wish to refine their gold, and still be acceptable to meet the required purity standards suitable for the gold coinage.
Other than make a general comment in this regard, I do not know enough in an accurate and absolute sense about US standards for acceptable purity of the gold.
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For really accurate atomic (and much more expensive) analysis, mass spectometry is needed.
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New Member
Australia
45 Posts |
 Hey guys, I got it tested on a different xrf machine, these are the results. Lemme know what you guys think, I think looks ok |
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New Member
Australia
45 Posts |
ive xrf tested some various other pre 33 gold and they all are showing 0.3 of AG in the results
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Pillar of the Community
United States
1757 Posts |
Ag is a carry over mining ore contaminant and Ru is a false positive.
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Replies: 22 / Views: 3,631 |
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First Page
Posted 04/07/2023 6:04 pm
