Earrings by John Field These keum boo owl earrings are made from sterling silver and 24ct gold and they measure 14mm x 20mm with a total drop length of 41mm. The technique used is an ancient Korean one, where gold is fused to silver at a high temperature. The silver has been oxidised to blacken it to contrast with the gold. We also make a matching owl brooch. Features Primary Material : silver Other Materials : 24ct gold Fitting Type : Continuous Hoop Dimensions (mm) : 20 x 14 x 1 One of a Kind : No Metal : 24ct gold and sterling silver Hallmarked : No Wire Material : sterling silver Cleaning InstructionsThese earrings have been finished with a clear, protective, anti-tarnish coating. We recommend when not being worn that the earrings are kept in their box or wrapped up so they do not get scratched.