Nugget shape looks highly unusual to me. Suspicious even. I saw this listing you may be interested in: Gold Nugget 2.3 grams Trade Me
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If its real i bet it came off someones claim
The weirdest bit is that some parts look very smooth (had to have been in a waterway for a long time if natural) yet there are inconsistent features and angles all over that wouldn’t be there if that were the case
So years ago I tried to melt some fine gold in spud ,turned out looking similar , I’m not convinced
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You really can’t assume as it was apparently over 30 years ago that he found them. He has a 100% positive feedback.
JW 
Yer, I kind of agree & that is the issue. He reckons he put them in a high concentration of nitric acid & then quickly removed them. My believe is that nitric acid doesn’t eat the gold but only other impurities with any host rock getting delt with. That is how a lot of guys in Aussie deal with gold quartz speci bits to eat out the iron stone & host rock to clean them up & make them more pretty. Hydrofluoric acid I believe will put gold into solution. Actually, now I have said that it might be Aqua Regia acid that does that which I think is a mixture of hydrofluoric acid & nitric acid. But I could be wrong there too. Anyway, nasty stuff. Then he said he wire brushed them to shine them up. They are a bit odd to say the least.
JW
Does have that look to it. I wonder if it isn’t melted down scrap jewellery with that copper content & the way it is in there & its general pale, silver content, colour over all.
JW
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Id have to agree jw ,i seen them an all his nuggets look strange in color and shape but then he has perfect feedback . I guess the only way to know is have them tested ? I am in chch an was gonna ask to view them but now they have bids someone’s gonna buy them regardless.
Got offered stuff like that in Central African Republic back in the 80s. Bro says buy it. Sceptical I cut it in half with my knife. Mercury almalgam.
For what its worth, I was one of the people giving the seller a hard time, and got this message from a guy who previously bought a “nugget” from him
“Brother, thank you very much. You were right about the gold nuggets being fake. I hope that I get my refund. Bless you.”
Anyway, he’s got more “nuggets” listed at the moment, it’d be interesting to buy one and cut it in half with a hacksaw to see what’s going on
Edited link
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That link just showed his feedback.
JW
You can find his listings on there. Extremely suspicious nugget again. I left a comment and he said leave it to the experts please 
. Yeah nah I have no idea how to identify natural nuggets.
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Can’t believe people are bidding on this. The description is nonsense. Hard to make head nor tail of it. Willing to guess it’s someone’s melt. Who knows what it contains. Blurry images provide no help. Rings enough alarm bells to stay well clear.
That aint gold and if it was itd be a sh!tload more as a unique specimen. Should hit him with this protocol:
To weigh gold for purity, you can use a digital scale to measure the gross weight of the gold, then calculate the fine weight based on its purity percentage.
Steps for calculating fine weight
- Weigh the gold in grams on a digital scale
- Determine the purity percentage of the gold
- Multiply the gross weight by the purity percentage
Example
If a gold ring weighs 10 grams and is 14 carat gold, the fine gold weight would be 5.833 grams. This is calculated by multiplying 10 grams by 0.5833, which is the percentage of gold in 14 carat gold.
Dont need an expensive XRF machine … dodgy!