18kt gold vermeil 14kt yellow gold drop design clip-on design laboratory-grown aquamarines laboratory-grown tourmalines laboratory-grown sapphires laboratory-grown rubies laboratory-grown emeralds laboratory-grown citrines round cut diamonds These earrings come as a pair. Normal everyday use and external agents may reduce the lustre of gemstones and gold surfaces. To maintain, use specific, non-abrasive products specially meant for cleaning jewellery.