This mesmerising investment gem is a rare Solid Black "Nobby" Opal from Lightning Ridge, with royal blue & green vibrant colour in an 18ct pave 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 G VS natural diamond, Including 18ct W/gold Trace Chain Measuring 16mm x 18mm + Bail. Photo colour match in natural daylight.