GEORG SPRENG unique pendant with round fantasy-cut diamond 'Flowerstar' ca. 1 ct, YELLOW/VS, 18K yellow gold and platinum, 5.7x5 cm, with NIESSING necklace L: 50 cm, 18K yellow gold, 36.4 g, 1993, good condition, with maker's sign, designed and handcrafted for DE BEERS competition 'Facets of Fantasy' 1993, model 'Flower Roundelay'.