Earrings by John Field These earrings are made from sterling silver and 24ct gold. The technique used is an ancient Korean one called Keum boo, where the gold is fused to the silver. Letters and symbols have been punched into the surface by hand, so each pair will be slightly different. The earrings measure 15mm square. Features Primary Material : sterling silver Other Materials : 24ct gold Fitting Type : Continuous Hoop Dimensions (mm) : 15 x 15 x 1 One of a Kind : No Metal : 24ct gold and sterling silver Hallmarked : No Wire Material : sterling silver Cleaning InstructionsThese earring have been finished with a clear, protective, anti-tarnish coating.