Earrings by Josef Koppmann These earrings are hand made with sterling silver overlaid by 24ct gold and have opals. There is a silver stud fitting at the back. Designed and handmade by jewellery designer Josef Koppmann. Features Primary Material : sterling silver Other Materials : 24ct gold and opal Length (mm) : 17 Fitting Type : Post Dimensions (mm) : 31x11x2 One of a Kind : Yes Metal : 24ct gold and sterling silver Gems : opal Hallmarked : Yes Wire Material : silver Cleaning InstructionsThe earrings are best kept clean by rubbing and brushing gently under running water with bicarbonate of soda. (Use soft material on quartz) Do not submerge in water for long periods. When not worn store in a box with acid free tissue paper.