Earrings by Josef Koppmann These 24ct Gold and Silver Earrings with Yellow Sapphires are designed and handmade by Josef Koppmann. Features Primary Material : 24ct gold and silver Other Materials : sapphire Fitting Type : Post Dimensions (mm) : 15 x 8 x 5 One of a Kind : Yes Metal : 24ct gold and silver Gems : sapphire 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.