The color we see on coins is very important for both grading and authentication. Please write a brief description of this coin's colors.
My guess would be glue as well, that was almost clear when new, but that has darkened with age over time.
I actually think it’s delamination from a potentially poorly mixed alloy combined with a harsh environmental condition. Either saltwater Or being buried underground. It looks like the surface has been eaten away. Not that there’s a foreign object on it. Being gold is pretty non reactive unless someone put acid on it I’d think environmental in origin
Nobody answered the question. The coin’s color is gold, some areas are darker, mixed with reddish tones. There are also a few black streaks.
look again. The glue is raised on the surface. See the little extra dab where the relief meets the field?
I have a question I want to ask, but first I need to know something. What is the coin in the close-up of?
So I'm not claiming it isn't glue/debris just trying to learn, but looking at the shadows it appears to be a cavity not raised. Am I missing something? I circled the shadows:
Lighting is important and can change the look of anything. And yes, if that were the only blob in the image some would argue that it is a crater with a discoloration on the inside. The dark line around the glue could be raised or a drop off. Now look at the total image and tell everyone how you can tell it raised. PVC residue is emerald green to very dark green. Dirt is black. So are shadows. I believe these are shadows.
I see what your saying and... If the light is coming from the south then it would look like it's raised. Did you used various lights for this picture at different angles and would that explain the shadows in different positions?
