Patina adds character to copper and bronze antiques—just don't confuse it with rust. When it comes to metal—be it a copper pan or an antique made from bronze—differentiating between a patina ...

Copper plunged more than 5% to trade below $9,000 a ton, in the biggest drop since July 2022, as worries over the impact of a worsening trade war sparked a heavy selloff in industrial metals and ...