What Is This Spot On Gold & Is It Removable?

Looks to be a liquid of some sort that got on the coin.
May I ask what kind of coin this is?

Edit: OH! to CCF!

The reason I say it could be a spot from liquid:

I have a PCGS MS64 1923 Peace dollar that got wet by a water hose (for reasons I'd rather not share) and developed a small brown spot on the top where water sat for the weekend while I was away at my father's house, rather than my mother's.

Plus the paper label is all crinkly, too

Looks like a classic gold copper spot. It probably can't be removed but I've never had this happen to any of my gold coins. If it bothers you, since it's on the rim, just take a toothpick and soak it with acetone. Then rub the area and see if it comes off.

Looks like a copper spot, shouldn't happen on modern .9999 gold, talk to the dealer, perhaps you can exchange it.

Update:

Well it's removed.
The acetone was not working at all, that spot was really penetrated.
First tried just dabbing it on hoping it would dissolve the spot. Not a chance.
Then tried rubbing lightly with cotton swab for about 10 minutes. Nothing. Then used the toothpick gradually overtime applying more force.
After about 1 hour of this I decided to change methods; noticing that the very slight amount I was removing was due to the buffing action of the toothpick, but it would take hours and hours at that rate.
Considering I was already this far into it I decided to very very carefully approach a light buffing method with a dedicated cloth.

In conclusion I opted for a slight buff mark as oppossed to the very noticeable spot.
I'd rather have a not-as-easily-noticeable buff mark which is on the rim versus a very noticeable and aggravating-to-see spot.
Now if this spot was on the face anywhere, no way would I have attempted the buffing knowing how the face and design is precise and delicate and a buff mark much more noticeable.

For buffing I used a jeweler's cloth and the toothpick tip underneath as support and buffed, buffed, buffed for about 30 minutes.


So what do you guys think? You can see the before and after photos.
Would you have gone this route? Do you think it's a big deal to have the buff spot?
Seeing how these coins are less numismatic and more so bullion I would think the value would not be altered, or not that much. The rest of the coin looks fine.
Maybe I'm just obsessing too much about it, but we are in a field where grades do exist and marks tend to matter beside just the annoyance factor.

The buff mark, while nowhere near as aggravating as the spot imho, still does slightly bother me as I know it's there and the coin is not 'perfect'.
I feel when you pay over $1000 for this item it would be nice to a have a mint piece. Maybe others just treat it as bullion but I was looking at it also from a collecting standpoint.
It's not like I have a stack of them! It's the only one.

Maybe down the road when at a dealer, if they have a newer piece of the same item, I might see if I can trade, just based on spot, even if a little more price required. Or maybe it's just not worth it. Who knows.

Thanks for the contributions. Just wanted to update the thread.

Thanks Dar, nice to hear. I appreciate that.
Also, looking at the full coin in realsize, the buff mark is not as noticeable as that closeup photo of course.