GNK Opals is an opal retailer in Coober Pedy, retailing both rough and cut opals targeting both the domestic and international markets. GNK Opals is a family-owned and operated business specialising in quality opal gemstones and jewellery. All jewellery is designed and manufactured in-house by owners, Gennadiy Karpenko and Nataliya Lebedyeva .

GNK Opals offer opal cutting and polishing demonstrations daily to visitors in their jewellery manufacturing showroom located on the corner of Brewster & Oliver Streets. Whilst in Coober Pedy drop in and visit Gennadiy and Nataliya at their beautiful showroom.