Spoiler warn: there isn't a common ‘finest metal detector for gold’. (Although the GPZ 7000 is close for those of you who can pay for a detector that’s precisely the same value as an auto). Minelab’s GPX 6000 metal detector is crafted by the whole world chief in gold detection http://ostrza-avalon.phorum.pl/viewtopic.php?p=400517&sid=4aad1fcc535bf610a7344bb4075808c6#400517