18ct White Gold 0.33ct Diamond House Style Half Eternity Ring. R1054. Chatsworth\'s 19th century Lotus and Palmette Diamond Tiara provided the creative sparkle for this glittering House Style collection. This collection is available in many different varieties include Silver, Marcasite and Derbyshire Blue John along with a Diamond set, for that something extra special. An embodiment of elegance and luxury, this 18 carat white gold ring boasts 0.33 carats of sparkling diamonds fashioned into an elegant half eternity style ring.