While some custom jewellery can tarnish and become discoloured or lose its shine, others will not. In many cases, it will depend on: The materials Their exposure to moisture Their exposure to chemicals  The high-grade, premium custom jewellery range will not tarnish, and that's what the best quality jewellers will offer. When you shop with them, you receive tarnish-resistant designs that are also ideal for wearing every day. Those custom jewellery pieces layered with gold laid on top of sterling silver will retain their perfect, newly crafted state, as will those made with gold vermeil.