24ct Australian Opal & Diamond 14K Yellow Gold Pendant. This genuine, quality Australian opal pendant has been inlaid with a stunning Coober Pedy (Old 4 Mile East Pacific) opal on a Queensland opal boulder backing (inlaid doublet) in a solid 14 karat gold setting with a genuine 3 point diamond here at World Class Opal Australia. This gorgeous piece features blistering pillars of red / orange fire featuring prominently with stunning lime and aqua accents.