18 karat yellow gold plated brass hook earrings with jadeite. Material: brass and white jadeite donut; 18 karat yellow gold plated. Earring length: 6.0cm (hook included). Stone diameter: ∅12.0mm. Brass oxidises easily than other precious metals and electroplating helps to reduce the speed of metal oxidisation, also gives it an alternative look. To keep the good condition, clean with neutral detergent or water (use soft brush if necessary) after wearing, wipe dry and leave in the air for about two minutes (vapour off) and seal in a zipper bag.