Gold’s rarity on the surface of Earth makes it a treasured resource, but the precious metal is not nearly as sparse in the planet’s deeper layers. The Earth’s mantle contains gold, especially in spots ...

Humble fragments of clay crucibles and coin molds flecked with gold excavated by a joint team of British and Malian archaeologists in 2005 led archaeologist Sam Nixon, in consultation with Thilo ...

Gold has always been a hot commodity. But these days, finding a nugget isn’t too tricky: Much of the world’s gold is mined from natural veins of quartz, a glassy mineral that streaks through large ...