A little care keeps engraved jewelry bright for years.
Sterling silver
Silver darkens with air and skin. Wipe it with a soft polishing cloth and keep it in its box or a closed bag when you do not wear it.
Gold and rose gold plating
Put on perfume and lotion first, then the jewelry. Take rings and cuffs off for swimming, cleaning and sport, and clean them with a soft dry cloth only.
Stainless steel cuffs
Rinse with mild soapy water, dry well and bend the cuff gently, never at the same spot again and again.