Earrings by Donna Barry Features Primary Material : silver Fitting Type : Post Dimensions (mm) : 17x4x3 One of a Kind : No Metal : silver Hallmarked : No Wire Material : silver Cleaning InstructionsSilver dip then rinse with hot water. Use a soft toothbrush and fairy liquid brushing gently and rinse again. For best results, dry earrings with a hairdryer. This will avoid any silver dip residue or water stain.