I actually know what this is!! It's a coin from the game dread pirate, there's writing along the outside and it's cut in half, if you look at it closely it's dread pirate just sliced down the middle , I found one my first time out detecting and freaked out, but yeah I'm pretty sure that's what is. It's smaller than a quarter, if it were real it would be the size of a half dollar or bigger
But get it tested to see if it is gold I hope I'm wrong