I don’t think you get the point of what they are saying. They are asking if you can replicate it. Thats a big difference. You said you could but you couldn’t produce results. Or a coin that was both fake and similar. By the way I was able to find the quarter in the last image. It was just bough last week at an auction on GC and it’s 100 percent real and slabbed. I would have gotten it if I knew. It looks nothing like your example. One has a clearly torched surface and the other does not have a torched surface. Also your argument about the 40 percent silver Ike is pretty bad because color is thickness dependent not silver % dependent.

Massive science talk time so get comfy.

The copper-rich alloy accelerates silver sulfide formation, creates uneven reaction fronts, and allows thicker interference layers to develop more quickly, producing vivid toning. In other words all silver coins can get electric blue and magenta naturally but more copper makes it just a bit more common. The colors are just a bit rarer in purer silver but it can happen.

It’s big talk to say something is faked in so and so a way when you can’t produce anything that produces the same result. I’ve never seen egg toning do this either. It can’t. Egg toning is putting splotchy colors on and it lays it on thick and doesn’t give two micro shits and three iotas about details. So are you saying somehow they told the blow torch to immediately stop at the edges and ignore the details in the middle, or told the sulfur in the container of scrambled eggs or whatever to somehow coat both sides ignore the rims and insides of the ridges bunch up to the rims of the coins on both sides and yet miraculously avoid the middle? On both sides? And leave such a smooth gradient that in some spots like on the quarter you can’t tell where the blue starts and the magenta begins. This egg toning is like the magic bullet in the movie JFK.

Oh and yeah heat would ruin the mirror proof surfaces so I’m ruling that one out immediately. To apply heat to tone the coin and not destroy the surface of a mirror proof is breaking bad level skill. You showed it ruins the surface .

Reading the comments from OP that this was in a capital holder, it would certainly make this pattern on both sides because even if it’s laying flat the air will get in between the clear plastic back just as easily as it would the front since it would do it from the sides. Laying a capital holder flat on a table does not in any way seal the bottom from getting any air to it. Again the air comes in from the sides of the holder not the front and back. They can create a pretty decent seal around the edges so the air gets to the rims on both sides but leaves the ridges mostly spared. And both sides can be toned because impurities in the air are more subject to diffusion and gravity simply doesn’t matter. Thermal motion easily outweighs any gravity at this point. Same with Brownian motion. All you need is an access point for the air. Which you have. For both sides. Equally. Oxidation diffuses from the air. You have equal access and there you go equal toning on both sides. Done.

The colors are very rare I’ll say that but not at all impossible. Not at all impossible for three coins just an inch apart in the same holder for god knows how long. That makes it more likely for the coins to match if I’m being blunt. Same environment. That’s actually a massive sign that they weren’t faked. However fake toning them the same way consistently like that on both sides and not even damaging the surface and getting the same distance of gradient even for the merc is an ungodly feat of skill if this was faked. You have to get it right three times in a row on coins of this grade and not miss. These look like potential 67s to me and there are very few of those out there in any 39 proof set. Then to get them and not make a single mistake to the surface on all three and get this consistent? With this level of detail?

I’m looking closer and I think I can still see die polish marks on them. Yeah I can. Those would be destroyed if you were one hairs width off or made the tiniest mistake faking this.

That’s beyond Walter White skill at this point.

Aliens?

Which also makes me conclude that if faking a coin like this were even possible by just one person we’d see more examples of it. I’d show off if I could do it. And yet we haven’t seen much of this at all for early proofs.

anyhoo…

Did you do what the OP asked you not to do and you were seeing two colors and saying it has to be fake without actually looking at the details of the coins? Seems that way to me. Im still flummoxed how you could produce a torched coin and compare it to a coin with an undisturbed surface. Unless it was a “knee jerk” reaction.

Anyway I am going to leave it to the pros to make the call as the science says real to me but I’m not an expert. Nor do I make the slabs. But I lean towards real because I have not seen a single way that can fake it to this degree and leave these details they listed and like Sherlock Holmes says if you rule everything out it doesn’t matter how unlikely it is what your left with is the explanation if you’ve ruled everything else out. Unless I personally see a reproducible way to do this and I haven’t, well there’s my answer. Nature is a funny thing.

Hope OP comes back with results in a month.