18kt yellow gold Unchain My Art pearl and diamond single earring from DELFINA DELETTREZ featuring 18kt yellow gold, polished finish, chain-link detailing, bezel setting, claw/prong setting, freshwater pearl, round cut, white diamond, post-back fastening and for pierced ears. This is a single earring.. Hallmarked in the United Kingdom at the London Assay Office.. Pearls should be the last thing that you put on in the morning and the first thing you take off at night. Avoid contact with perfumes or creams, and simply wipe with a soft cloth to clean..