Sterling silver is an alloy of silver containing 92.5% by weight of silver and 7.5% by weight of other metals, usually copper. The sterling silver standard has a minimum millesimal fineness of 925.
Fine silver (99.9% pure) is generally too soft for producing resistant cufflinks, therefore the silver used is alloyed with copper - or other metals - to give it strength, while at the same time preserving the ductility and beauty of the precious metal.
Silver pieces are hallmarked in order to indicate the purity of the silver alloy used in the manufacture or hand-crafting of the piece and identify the company that made the piece. You will find Xavier Piot logo on each of your cufflinks to guarantee their origin and purity of the materials used.