The gold rush is on, with prices of the precious metal topping $3,000 this month for the first time. Here's what it means for sellers hoping to cash in, and buyers hoping to find a decent value.

Xu Gaoming, an ex-fisheries clerk in China who started jewelry brand Laopu Gold in 2016, has amassed a $9 billion fortune.

Meghan Markle, Kate Middleton, and other members of the British royal family often wear deeply symbolic jewelry—earrings, ...