Rare to see a toned gold coin

Nicely toned and such a high grade too!
Do you like toned gold coins?
https://www.ebay.com/itm/1819-NR-JF-Colombia-8-E-Escudos-Gold-Coin-AU58-NGC-MONSTER-TONED-Rare-Color-/372292456221?hash=item56ae5c0f1d%3Ag%3AtgsAAOSw441a54O8&nma=true&si=Dj6K65SZflJqNoruDmo6YzBZ1FI%253D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557

 

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Same as before, I don't do links. Couldn't you take the time to post the actual coin?

 

I don't bother with links to other places.

 

That's a real beauty. Someone will be very happy with that coin for sure.

 

Yep, monster toned beauty!

 

I took one for the team.
Sold for $2399. NGC AU 58
edited

 

I don’t normally care for colourful toning, but that looks good. Although gold can tone I imagine those colours are from the .125 alloy.

 

Thanks hotwheels,
I too, like this coin!
(And the bust of old FERNANDO does not make him look like an inbred dork)
A-Huck,
T.T.

 

That is from @jwitten and he has an amazing collection of toned gold.

 

Yep, that one used to be mine. I wish I was rich enough to never have to sell a coin, lol. Congrats!

 

I like it a lot. I'm not interested in sketchy links, but an ebay link (and well reflected by the URL posted) is not worrisome IMO. That said, it is nice to just look at the photo.

As for the forum rules @GDJMSP I'm guessing if attributed okay? Or what about a screenshot clearly identified? Personally I'd want to stay on the side of preserving intellectual property.

Oh well, for the OP though, that is a really neat coin. If it was my series and I'd seen it, I would have gone for it.

 

Understood, it won’t happen again. Sorry for not reading up on the rules.

 

I've seen toned gold coins, mostly 8 escudos cobs. The toning, such as it is, tends to be reddish. I've never seen blue before on a gold coin. If it was a silver coin, that color would be expected.

Pure gold does not tone or tarnish. It is the alloy, usually copper, that can create the red hues. I've also seen old US $20 coins from the 19th century with a greenish cast. Again, I think the copper used for the alloy causes this type of toning.

The blue areas on the coin are unusual, I think. Perhaps they were caused by something that the coin came into contact with. Some old envelopes were high in sulfur, such as the manila paper envelopes, so that might be a cause.

Another possibility is that the coin has silver as its alloy, instead of copper. If that is the case, then blue toning could occur.

 

That’s still odd even if silver. Does that mean there is a higher concentration of silver in those specific areas? I thought alloys like this were well-mixed.

On that note, why don’t electrum coins seem to tone blue?

 

Sulfur is the only chemical that I know of that can create the deep blue to almost black toning for silver.

You can actually induce this color by exposing a silver coin to something with sulfur in it, such as storing a coin in a manila paper envelope.

Also, there's liver of sulfur (nasty stuff to handle), which, depending on the concentration, can induce blue to black toning. In lighter concentrations, a yellow to bronze color can be created. Also, coins treated with liver of sulfur tone even more, even if the solution is well washed off. It seems that exposure to liver of sulfur creates a reaction well past the treatment.

In the end, it is usually best to leave toning to nature and time.

 

Here's an 8 escudos from Lima, 1750, assayer R, and salvaged, that has a somewhat reddish color.

27.0 grams

 

I feel like the red looks somewhat more natural, and the blue toning looks relatively more contrived.

 

I agree. It is odd to see this color of toning on a gold coin.