A metal detectorist said he cried tears of joy after uncovering a 17th-century gold posy ring—which he claims could have been thrown away after a “lovers’ tiff.” Robin Potter, 50, from Helensburgh, Argyll and Bute, Scotland, found the 400-year-old ring in a farmer’s field and is now waiting to hear if the rare piece of jewelry will be claimed by the National Museum of Scotland. Potter, a full-time carer who found the ring in the month of June, said the day had started off pretty normally. The keen metal detectorist, who usually checks with the owner of the field he is going to detect, found this particular field empty. “I had dug several signals which turned out to be random bits of iron and then on about the fifth signal I wasn’t going to dig it as it wasn’t that strong but I went ahead anyway,” Potter said. “I started to pull …