Earrings by Josef Koppmann The 18ct White Gold earrings with Lemon Quartz Briolettes are designed and handmade by jewellery designer Josef Koppmann. Features Primary Material : 18ct white gold Other Materials : lemon quartz Fitting Type : Hook Dimensions (mm) : 32 x 8 x 8 One of a Kind : Yes Metal : 18ct white gold Gems : lemon quartz Hallmarked : Yes Wire Material : 18ct white gold 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.