Balance NecklaceSimple and elegant, the balance necklace features an oval Australian opal encircled in an open setting with 14 karat gold. solid 14 karat gold 6 x 4 mm Australian opal 0. 23 cts 18" solid 14 karat chain Opal origin: Coober Pedy, Australia. Cut and set in house at the FTB studio in Sydney, Australia. Fade to Black ensures that all stones are sourced from ethical suppliers with whom we have trusted partnerships. All stones are conflict free.