I am not a big “look through my change” kinda collector. I will quickly look for W quarters and the occasional silver. But I got 2 quarters recently that caught my eye. This first one is oddly close to copper color. Environmental damage or some chemistry experiment? The feel of the 2nd one grabbed my brain. The edge was perfectly smooth all the way around coin, with no irregularities. On closer inspection, it is slightly beveled. How in the world did someone do that? I dont think it was sanded or filed…. I think is was compressed.
Looks like a dryer coin to me. Caught in the mechanism of a clothes dryer, rolled long enough to squeeze down the edge. I've seen a lot of coins like that -- cents, nickels, dimes, quarters, halves, and even one or two Morgans.
I will go with ED, environmental damage on both coins. Your second coin was a match to possible "dryer coin." Fits all of the parameters.