Is this common toning?

Bothuwui

I was looking through my proof sets and came across a pretty nice toned 1970S lincoln. It had what looked to me to be nice toning, with a teal, blue, yellow, and orange rainbow almost circling the coin. THe only distracting factor was a small spot between Lincoln's head and the 1st T in Trust. Attached is a photo (Note: all the ohter garbage in the photo is dust on the mint packaging, not on the coin). Is this something I should get slabbed, or just another common proof coin? I wish the pic came out better, but I've been terrible at coin photography, even after studying how to do it on the boards.

The rest of the coins in the set display a ring of milkiness, working it's way to the center.

nOoBiEeE

Very nice toning, where are my darts???

airplanenut

1970-S is notorious for this type of toning... actually, the only real date to have them.

Is it for sale? PM me a price

Placid

If you like it now take it out so it stops toning or wait if you want to let it tone more.

Bothuwui

So why does only the lincoln look good? The rest of the coins look terrible. Are they "developing" toning, or are they just ugly and ruined? Here's pics of the Jeff and Kennedy as an example.

Placid

Whatever is toning your coins may react different with copper than nickel and silver.

Myqqy

I'd yank that cent out, before the toning turns in a direction you don't want it to go. That milky, hazy discoloration is very common in those sets- I don't think it's going to turn rainbowish....

PCBUM

Yes it's common, here's mine that is part of my 1970 proof registry set that was pedigreed by PCGS

rainbowroosie

Somewhat common, but COOL!! I like it!!

BillJones

Yes, as some else wrote, a lot of 1970 Proof sets, especially the cents, did this. For a very long time this would be called "a bad penny Proof set," which would make it a "cull" in the eyes of a lot of collctors. Given toning craze, however, I guess its time as come although you should know that the piece would now be called "red and brown" and according the catalogs, it has a lower price.