Sadly it was not to be folks. It was a small gold stud earing, and it was lost in a paddock next to a wire fence and a hut, so the iron was tricky to avoid and it was lost right by the fence, with long grass that's full of junk on the other side. I even tried crawling with the pointer near to the fence but it was a forlorn hope.
It was still nice to be thanked for my efforts, and to have a good old chat with the farmer. Oh well, back to the fields we go !