Welcome to Treasure Net !!
Great find.
Can you post a pic of the reverse side along with something that will show us scale?
Off what state or country's shore did you find it?
Don.....
gold does not corrode -so wonder what happen to its detail - might have been in a fire
looks like hole at bottom - might be a pendant or piece of jewelry
but rough look is curious still
Your coin could have been from the "in-and-out-out" action movement of the sand. The wet sand zone is not stationary. Sand goes "out" in the winter storms/swells/tides, and comes back in during the spring/summer calms. And targets come and go with the sand. Hence coins you can find during erosion can be "beach-kissed" thin screwed up wafers.
I've found 4 of my gold coins from the wet beach after storm/erosion. And each of them was pristine (just fallen out of the dunes, or stuck in bedrock, or whatever). So I just got lucky. And so too are the other gold coins from the beach in my area so far: like they came out of the ground. I believe that's because *normally*, since gold is so dense, it would be the last thing to move. So if sand movement is subtle, then ..... whereas dimes and nickels may move, yet heavier items (sinkers, gold coins, etc...) might be more apt to remain stationary.
I have heard of a gold coin on the beach in my area being found, which was nothing more than a wafer. So obviously it had been in a turbelent zone.