9kt yellow gold Orso green onyx earring9kt yellow gold polished finish huggie hoop design bezel setting faceted pear cut green onyx round brilliant cut white diamond lever fastening This is a single earring. Hallmarked in the United Kingdom at the London Assay Office. 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.