Diamond Stud Earrings - .20 total carat weight A girl must have...Simple and elegant, a must for every jewellery box. £350.00 £350.00 1 in stock. These are beautiful diamond stud earrings, set in 18 carat white gold with contemporary rubover settings. Total weight .20 carat Quality SI, colour G Other sizes are available either in stock or larger sizes available to order All diamonds are guaranteed conflict free. Handmade in Mayfair, London by designer/jeweller Nikki Galloway.