I have read whereas a few folks have have found gold rinds as low as 40 on the ATPro - I usually don't check out anything below 44, a lot of foil that low, but I still check the better sounding signals. The jewelry found is the cat's meow of metal detecting as rarely will any dug coins come close to the value of a nice gold ring or even a silver ring. So be patient and prepared to recover some junk items in the quest for some silver and gold.