Looks like EF details, cleaned to me. Next time, you should create your own thread if you want to ask questions about your coins.
When the devices have a lighter toning than the fields.[ATTACH]
I've been looking for an explanation for circulation cameos for some time now. Now I have a very plausible theory. Thanks!
I'm starting to get confused about who is trying to make what points. No matter what the environment is, the color progression would always be the...
Sorry I haven't gotten back sooner. I needed to wait for a chance to look at the dollar in-hand before I answer your questions. One would...
Those are environmental factors, not surface alteration factors.
I am the ripe old age of 19. Just finished my first yeat at Georgia Tech. :)
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I just looked at Collectors Universe and read the whole thread. You seem to be exaggerating this negative opinion as more people said MS-66/67...
Two things will hapen with that example: 1. The oil from the hand cream/finger will seal the surface of the coin and prevent toning. I have seen...
Let me rephrase that. When the surface quality is SIGNIFICANTLY altered. The presence of human DNA or bacteria of the surface of the coin would...
There is a specific order of colors that have to appear next to each other to be natural. For each increment the patina thickens, the intensities...
Then don't buy it. I am just explaining the physics behind what you are seeing.
My example is the seated dollar I posted. It is toned nearly black (though it looks a lot brighter in the pictures), and it has red/yellow toning...
Here, you have any problems with the theories with these coins that follow the theory perfectly?...
Sure, you can say that. Some of the thickest patinas are about 1000nm, but I would estimate the depth of the patina on this coin to be about...
I agree that the surfaces are not original and that there were at least two toning events on the OP's coin. I was just arguing that the...
Which one?
A fully-lustrous, uncleaned coin that reacts to the H2S in the environment will ALWAYS follow the toning progression. The style and minute details...
Yes, I get all of the physics behind thin film interference where it applies to silver coins. However, for it to work, the metal surface needs to...
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