Earrings by Helen Rankin The Sync Stud Earrings feature tiny rhythmic angles and texture. 18ct gold plated sterling silver Features Primary Material : 18ct Gold Vermeil Other Materials : Silver Fitting Type : Post Dimensions (mm) : 10x10x2 One of a Kind : No Metal : 18ct Gold Vermeil Hallmarked : No Wire Material : 18ct Gold Verneil Cleaning InstructionsWe recommend storing your jewellery in a zip lock bag as exposure to the air and environment can cause your jewellery to tarnish over time. Zip lock bags are a cheap way to keep your jewellery looking newer for longer. Acid free tissue is also an excellent way to store your jewellery.To brighten up your silver pieces we recommend using a silver dip solution. Always ensure you clean your item after silver dipping, with warm soapy water and a soft toothbrush. If your piece is partially oxidised we advise cleaning the bright silver areas only by rubbing with a silver polishing cloth.For gold plated items, you can use warm soapy water and a soft cloth to remove any dirt however it will not bring back any shine of the original plating. We would recommend a re-plating of your item if you want to give it its sparkle back.