Stone tools found in a 4,000-year-old grave near Stonehenge have traces of gold on their surfaces that indicate they were used to fashion gold ornaments. In 1801, archaeologists found the assemblage of Bronze Age artifacts, including the stone tools, in a barrow or burial mound from about 1800 B.C. near the village of Upton Lovell, about 10 miles (16 kilometers) west of Stonehenge. The assemblage(opens in new tab) includes flint axes, a necklace of beads of polished stone and dozens of bone points — possibly from another necklace and the fringe of a garment. The collection, which is now on...