Cufflinks by Kate Smith Gently curved silver cufflinks with acid etched patterning across the centre.Hallmarked backing, with standard style hinge fitting.22ct gold plated etched lines to give warmth and definition.1.3 x 2cmAlso available in silver with oxidised detailing. Features Primary Material : sterling silver Other Materials : 22ct gold plate Fitting Type : hinged bar Dimensions (mm) : 11 x 18 One of a Kind : No Hallmarked : Yes Finish : rough satin Cleaning InstructionsPerfumes, lotions and chemicals can all affect the look of jewellery over time.Using a soft (old!) toothbrush and warm soapy water can remove build-up of dirt/discolouration.Using hairdryer (on a low setting) afterwards will help to avoid water marks on your jewellery.Avoid contact with harsh chemicals, especially when wearing jewellery with gemstones.If you find your item of silver jewellery blackens when you first wear it, follow the above method of cleaning with a toothbrush & warm, soapy water.Initial discolouration should fade within time. It isn’t clear why this can happen to some people’s jewellery, but from researching, it seems it could be attributed to medication, diet or even pregnancy! (If you are male, you can probably rule out the last cause).FinishesFinishes that are applied to our jewellery can alter over time, simply due to everyday wear. This is more applicable to rings and bangles; satin & frosted finished pieces may become shinier with wear and polished items can become slightly duller with time.