Earrings by Josef Koppmann The earrings are hand made with sterling silver overlaid with 24ct gold. There is a silver stud fitting at the back. Designed and handmade by jewellery designer Josef Koppmann. Features Primary Material : 24ct Gold and sterling silver Other Materials : druzy agate Length (mm) : 5 Fitting Type : Post Dimensions (mm) : 9x9x5 One of a Kind : Yes Metal : 24t gold and sterling silver Gems : druzy agate Hallmarked : Yes Wire Material : sterling silver Cleaning InstructionsThe earrings are best kept clean by rubbing and brushing gently under running water with bicarbonate of soda. Do not submerge in water for long periods. When not worn store in a box with acid free tissue paper.