Does this half look AT ?

it's really hard to tell from that picture...and without coin in hand you can't be %100....the picture is kinda small....But i'm gonna go out on a limb and say NT

Because of the uneveness, especially the area around 6 o'clock I'd guess artificial.

After the last set of photos that were shown in the other thread, I am going to only say that it does not look like obvious AT from that photo in that light and at that angle and on this day.

My gut, though, says it has about a 90 percent or greater chance of being NT. My biggest hedge is the way the picture was taken in that it doesn't really show luster and looks to be over saturated or something making it look rahter un-lifelike.

Reasons?

the only reason I say that is that I bought a 1955 Mint Set last week and the halves looked very similiar to this coin....this coin might be out of a mint set...but without having it in hand there is no way to tell

One general thing I wonder about with toning as well is what makes the colors? The silver can really only turn to an oxide (black) a sulfide (most common and black) and a chloride (white). There's a way to get purple with iodine but that's rather fake.

So it must be the copper in the alloy that gives it the color right?

Oxides of copper are red, sulfides still dark, but with some carbon you can get greens and blues too.

The colors are from the same type process that causes oil to give a rainbow effect on water. Thin film interference. or something like that. That is about all I have read or understand about it. We need a physicist.

Hmm, tht makes some sense so the closer your toned beauty is to violet the sooner it will turn black. Although I suppose slabs are pretty good at keeping the Hydrogen sulfide away from the surface.

That is the way I understand it. There is a specific sequence of progression of colors depending upon how thick the toning is. But, of course, I cannot remember the sequence.

Not really, if the sulphur is airborne. Generally, slabs leak air and allow any atmospheric contaminant in. They're pretty good at stopping surface wear, though. ;-)

Really? They must slow the process somewhat. They do have those color guarantees for copper.

Depends upon the slab, I imagine. Some slabs seem to actually tone some coins:




Bigger pics of the 100% White coin:

http://www.stujoe.com/images/grade/2003/images/g57o.jpg

http://www.stujoe.com/images/grade/2003/images/g57r.jpg

Depends upon the slab, I imagine. Some slabs seem to actually tone some coins:


I would like to see that coin in a year.

I sold it about a year ago so I would like to see it now too. It got noticeably darker in the year I owned it.