Earrings by Josef Koppmann These 24ct Gold and Silver Earrings with Black Round Druzy are designed and handmade by jewellery designer Josef Koppmann. Features Primary Material : 24ct gold and silver Other Materials : druzy agate Fitting Type : Post Dimensions (mm) : 22 x 13 x 5 One of a Kind : Yes Metal : 24ct gold and silver Gems : druzy agate Hallmarked : Yes Wire Material : 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.