18kt recycled yellow gold Taro blue chalcedony earrings from THE ALKEMISTRY featuring 18kt recycled gold, chalcedony, drop design, delicate chain, push-lock fastening and for pierced ears. 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..