A metal detectorist who discovered a gold mourning ring dating from the 18th century is overjoyed after it was declared a British treasure.Malcolm Weale unearthed the ring in a field in the eastern county of Norfolk last August and said he was 'shaking' as it sparkled in the sunlight.The lost jewelry is believed to be a memorial ring for Sir Bassingbourne Gawdry -- the 3rd Baronet of Harling -- who died in 1723, a year that was engraved on the inside.Mourning rings are worn in memory of someone who has died, typically bearing the name and date of death of...