This mesmerising investment gem is a rare solid Black "Nobby" Opal from Lightning Ridge, with royal blue and green vibrant colour, set in an 18ct pavé natural diamond frame. Designed by Robert Pearce and meticulously crafted by Bez Ambar, working together creating the finest jewellery for Australia's finest gems. — "Nobby" Opal weighing 4.12ct, 0.64ct brilliant cut G VS natural diamonds, 18ct white gold, including 18ct white gold trace chain, measuring 16mm x 18mm + Bail. Photo colour match in natural daylight.