Well - I really don't know about it myself. The dealer had a coin(I think morgan) with these rainbow(not sure if that is the correct term and it was graded by NGC) colors on one side and white on the other. I will it admit the coin I looked at the color was more even around the rim and did not go all the way to the center. As I look at this was more it almost looks like something was poured on it - stripped the face and then settled into the lower areas making them tone. Of course this is just speculation on my part and is just my impression of this coin.
The first photo is severly overexposed and I suspect the coin in-hand is significantly darker than the scans suggest (particularly if I recoginze this seller's scans) and the colors a bit off....Mike
What causes that??? Is it something like alcohol thats been burned off the coin??? Something along those lines???
I kind of hate to let the secret out.....but as a photographer using the wet plate process, we have found a trick to get that toning onto an unvarnished new plate, to show the effects of age and being part exposed to the air/ and part under a mat. Its not a nice thing to fake an antique, but it can be done. Its putting the plate in a little box with a diced up hard boiled egg. The areas under the mat remain fresh, while the image area will tone inward from the edge of the mat. I dont know if it will tone coins, but silver is silver.
This is obviously one of those low mintage proof design subtype Psychedelic 60's coins. It's making me dizzy just looking at it. :goofer:
