Aqua StudsA refined everyday classic, the aqua studs feature oval Australian opals that add a subtle hint of color. Made with solid 14 karat gold, sold as a pair. Solid 14 karat gold 6 x 4 oval Australian opals opal origin: Coober Pedy, Australia. Cut in house at the FTB studio in Sydney, Australia. 14 karat butterfly back closure Fade to Black ensures that all stones are sourced from ethical suppliers with whom we have trusted partnerships. All stones are