Gold prices fell Thursday, pressured by a stronger dollar and widespread market selling that forced some investors to trim positions. Spot gold dipped 1.8% to $4,872.83 an ounce by 1:31 p.m. ET, while April futures closed down 1.2% at $4,889.50. Silver took a bigger hit, plunging 12.1% to $77.36 after touching a session low of $72.21 amid the broader precious metals selloff. “Some people are facing margin issues” — broker demands for extra cash to cover losses — and were selling metals because of equity losses, said RJO Futures senior market strategist Bob Haberkorn.