4.03ct Coober Pedy Opal, with green, blue, pink and orange, set with 3 – 0.09ct E/F VS natural brilliant/princess cut diamonds. Designed and handcrafted by Robert Pearce, fellow of the prestigious 'Gold & Silversmiths Guild of Australia'. — 18ct rose gold and platinum, including 18ct rose gold faceted trace chain weighing 5.35 grams.