Got a pic? I'm anxious to see. Have one my self, made post last week and no one took notice, have a serious question about mine.
Its a bullion coin (not the collector edition) still has value, the artificial toning I dunno. but weight in silver $15 they usually get around 20 without the toning. but its hard to say. the 2015 W burnished gets around 42. would have a w mintmark on it. the reason I say I don't know is I don't know what the toning premium is or is not. the proof is around 50 market value.
Neither, its a bullion coin. the stackable silver. problem is they produced 47 million of that type. but the toning did turn out nice even tho its AT. Im not an expert but I do buy a lot of these, am pretty familiar with the prices. without toning. 2015 1 oz Silver American Eagle BU $19.76
Toning is a reaction to oxygen and sulfer in the environment over time it doesn't seem like four years would produce this without intentional help with the process.
I would keep it, until I sell it, what I do is buy them sometimes with other things, its silver so it always sells, but I keep them until I want something like another coin that may be pricy, then I sell some to buy whatever, because their easily replaceable, but some I guess have good fortune with toned coins. There are several ways to tone them, some use a lamp I guess, sometimes they turn out ugly, lol, and people want a fortune.
if it was naturally toned, don't you think the rim edges facing up would also be toned? If it was in a holder, the edges would get toned first and move inwards.
The toning is plausible. The rims are green, and a little lighter in shade than the blue away from the rim. From left to right, this is the typical color progression of toning (from Jhon E Cash's website): The orange-magenta-blue-green progression shown in the middle matches the coin, so it's plausibly natural. How it developed so evenly in only 4 years, I can't tell you. Will a grading service validate it? Maybe. If each time you were to send it, there's a 30% chance (I really don't know what this number is) of it being graded, assuming each grading attempt is independent of the previous, then by the third try, you have a 75% chance of it getting in a graded holder. Call it a game if you will, but it's one that gets played a lot. If it were mine, I'd compare with other toned ASEs and show it in person to people who deal with this stuff.