The super glue is at the ready.
I remember once that I found an old decanter bottle half buried on some land that my family use to own. It was minus it's glass stopper and I thought that I'll never find the stopper for it. A couple of days later I was on the land in the same area and I saw something glistening in the sunlight which turned out to be the stopper.
The most unusual thing that has ever been found on my property is a fossilised tropical scorpion which my late father found around 1970, about 2 foot down, while digging a post hole. Presumably someone had brought it back from a foreign trip and then decided that they didn't want it.