Earrings by Josef Koppmann The earrings are hand made. Diamonds are set in solid 24 carat gold with a 18ct yellow gold setting at the back. Features Primary Material : 18ct yellow gold and 24ct gold Length (mm) : 4 Fitting Type : Post Dimensions (mm) : 8x7x4 One of a Kind : Yes Metal : 18ct yellow gold and 24ct gold Gems : black diamond Hallmarked : Yes Wire Material : 18ct yellow gold 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.