Brooches by John Field This Fish brooch is made from sterling silver and 24ct gold. The technique used is an ancient Korean one called Keum boo where the gold is fused into the silver at a high temperature. This brooch measures 20mm x 45mm. We also make a pair of matching fish earrings, which can be seen in one of the photographs above. Features Primary Material : silver Other Materials : 24 carat gold Pin Type : pin Dimensions (mm) : 20 x 45 x 0.7mm One of a Kind : No Metal : 24ct gold and sterling silver Hallmarked : No Finish : mixed Cleaning InstructionsThis brooch has been finished with a clear, protective, anti-tarnish coating. We would recommend that when the brooch is not being worn, it is stored away wrapped up, so that it does not get scratched.