By Graeme Murray A metal detectorist has unearthed a 1,500-year-old gold ring in Denmark – and it may have once belonged to an ancient king. The rare find could have belonged to an unknown royal family which has connections to France. Lars Nielsen came across the large ornate piece of jewellery set with a red semi-precious stone, in Emmerlev, Southern Jutland a translated statement says and it is believed to date back to the fifth or sixth century. Mr Neilson said: “Such a unique and one-of-a-kind find is completely surreal.” The National Museum of Denmark believe it has great “historical sign…