I'm not 100% sure, but it looks to me like it is the result of environmental or chemical damage. What does it weigh? Chris
Hmm Yes how much does it weigh? lol I still need to invest in a scale, but hopefully soon I will have one and will follow up. Recommend any decent cheap scales, maybe where to get them either in stores or online?
Ok, so I went out and bought a cheap scale. I'm not exactly sure if I should be weighing in Grams or Ounces so here is both weights. 5.5 g, 0.193 oz
OK weight is too high to be missing a clad layer. The normal spec weight for a quarter is 5.67 grams. 5.5 grams is a little low but is within the mint tolerance range. A quarter with a clad layer missing would be in the 4.2 gram range.
from the color of the coin in the photos I would say that it is turning brown from environmental damage. a coin with a missing clad layer is pure copper color just like a new cent coin.