Cufflinks by John Field These halved cufflinks are made from sterling silver with brass decoration and a choice of gemstone. They measure 22mm in diameter when together. A pattern which we have designed is embossed onto the silver to create an interesting surface texture and because these cufflinks are handmade the pattern will vary slightly on each pair. The double hinged cufflink backs are also made from sterling silver.We offer eleven different gemstones which are, Amber, Amethyst, Pink corundum, Garnet, Lapis lazuli, White moonstone, Blue spinel, Green spinel, Red and Blue lab. grown opal triplets, Turquoise. Please select your favourite stone from the 'Finish' drop-down menu. Features Primary Material : silver Other Materials : man-made opal triplet Fitting Type : hinged bar Dimensions (mm) : 22x11x1 One of a Kind : No Metal : silver Gems : man-made opal triplet Hallmarked : No Cleaning InstructionsThese halved cufflinks have been finished with a clear, protective, anti-tarnish coating.