British mother and son find US$400,000 treasure

Years of metal detecting have paid off for Mary Hannaby and her son, Michael of Hemel Hempstead, England. The two recently discovered a piece of gold, believed to be part of a reliquary or pendant buried four inches below the surface of a field in Hertfordshire.

The artifact, dating to the 15th century, depicts the Holy Trinity. It will be auctioned by Southeby's in early July, 2009.