Toning On A Modern Coin? 2000 P Sacagawea $1 Coin

Ahhh okay that makes sense, so would toning from the roll itself be considered artificial correct?

If the toning is within the specific TPG's boundaries of acceptability, it will grade. THEY ARE ALL DIFFERENT.

Disclaimer - I don't know this series, especially about how they tone other than to full brown. I was quite surprised by the toning! My only suspicion is heat exposure. I've never put one of these under a torch but now it's on my bucket list. LOL

My gut says the toning would be market acceptable. I see some brown closest to the rim and logical color progression. The reverse is nicely toned - too bad about the fingerprints. I'm pretty sure if you put this up for auction you'll get a great price. Otherwise ff you collect these, run it through the polarity ladder to stabilize those prints and put it into an airtite.

The problem with using words like "artificial" is that in many cases, it is chemically indistinguishable from "natural" toning. Exposing a silver coin to sulfurous gases will make it tone in exactly the same fashion as if it had toned "naturally" just sitting on a shelf for years. The only difference is time. It is perhaps better to refer to "accelerated toning" as the opposite of "natural toning". Some "accelerated toning" is bad, others are acceptable - because of that whole "a difference that makes no difference is no difference" thing. "Bad" accelerated toning gives a coin an unnatural or garish colour. Applying chlorine bleach to a silver coin gives it a weird blue-green colour you don't get from natural silver toning, for example.

The alloy used for "golden" dollars is chemically more reactive in air than traditional coinage alloys. 20 years is more than enough for such a coin to tone "naturally". So I doubt this coin would be condemned on the basis of its toning.

A normal 2000p should not be graded generally, only the cheerios or wounded eagle or rare mule one in very good condition due to the value after grading. https://www.PCGS.com/prices/detail/...des-61-70/ms

Heres a good article on Sacagawea toning over time and whether that adds value. https://www.PCGS.com/news/color-of-...deeper-tones It is unknown to what extent collectors may prize rainbow toned coins vs original but typically there will be collectors out there who value it and will pay a premium for quality examples.

As far as toning goes, the PCGS graders look for original, natural-looking, attractive toning. A coin that looks unnatural is either going to end up with a lower grade or not graded. A toned coin that is overly dark and unattractive is not going to get a high grade no matter how original it looks. Coins that have been artificially toned will be encapsulated in a PCGS Genuine holder and assigned a PCGS No-Grade code of 91, which indicates questionable color. Genuine Not Gradable will also be indicated on the reverse of the holder. Additionally, coins deemed to be artificially toned and are encapsulated in a PCGS Genuine holder will also be assigned a unique certification number. https://www.PCGS.com/news/originality-and-toning

For NGC, Fewer than 1% of the coins graded by NGC get a Star rating. The star is like a beauty pageant for coins, to decide if they have "exceptional eye appeal." The grade designation is not as important as how the coin looks compared to others in its grade. NGC admits that these evaluations can be subjective, but If any one of the quality-control graders objects to a Star designation, it's over. To be considered for a Star Rating, a coin must first meet certain quality standards. It must have a full vibrant luster and be free of any distracting irregularities, spots or blemishes. Coins submitted for stardom can be either "white" (untoned) or toned. Toned coins face even more hurdles. The toning must be considered attractive, with good contrast if there is more than one tone present. It also must have full luster unimpeded by the toning. And while the toning can be single or multicolored, it can't have any areas that are dark brown approaching black. https://www.ngccoin.com/news/article/806/

I do not know yet any study about this Manganese alloy spectrum. If I look to others coins indifferent of the alloy all has same characteristics: 1. The lover parts of the design will color before the high relief. In the case of this coin is different because the both reliefs color in same time with same color. Is suspicious.

2. Could be the angle of the photo which do not show correct colors, but why the upper rim is not affected and the lower rim is already toned.?
3. I do not recall that the Mint sold rolls in 2000 of this coin. Maybe, not sure.
4. Ladder polarity you can try. Could be OK, but do not forgot that the toned coins in fact developed protective oxide. So the question will be what oxide develop this alloy in order to apply the polarity ladder?

By spectrum and what I can deduct from the photos I will say that this coin is artificially toned.

Yep, very interesting. So the Manganese alloy develop the toning like the pure silver and the 925 and plus gold. First photos show yellow, red and blue and the second ones (probably early stage of toning) show yellow and red. Very interesting, no green. More studies must be done on this alloy toning.

Looks like album tone. MS-63.