Earrings by Josef Koppmann The earrings are hand made with sterling silver overlaid with 24ct gold. Mandarine Garnets and Fire Opals are set in solid 24 carat gold with a silver stud fitting at the back. Features Primary Material : 24ct gold and sterling silver Length (mm) : 7 Fitting Type : Post Dimensions (mm) : 7mm One of a Kind : Yes Metal : 24ct gold and sterling silver Gems : fire opals and mandarine garnets cabochon 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.