My DH (or not so darling)lost his during footy practise, i told him so many times not to wear it while playing sport but he didnt listen.
He came home with a bunch of lillies and said he had something serious to tell me (at the time he was in the airforce and there was talk of him being sent Overseas) i said oh no when do you leave. He then replied it wasnt that but that he lost his ring while playing footy.

So the next day we (yes i helped) searched the whole of the footy oval and after 2.5hrs of looking we were about to give up when i saw a glimmer out the corner of my eye. Sure enough it was his ring!! So they can be found.

Good Luck