Matt James has collected gold nuggets for years from the hills and riverbeds of California, but as the precious metal's price soars, he has found an unexpected El Dorado: on social media.

Though the value has fluctuated, it has effectively doubled in the last two years, reaching an all-time high of more than $4,380 an ounce in October.

Originally published on doc.afp.com, part of the BLOX Digital Content Exchange.