Federica Rettore antique cut green prasiolite ring ($10,900) found on Baubles and Trinkets. Federica Rettore is Italian. She has showcased her collection around the world. Her designs are in demand by international upscale worldwide stores because of her reputation and focus on non-traditional, fashion sensitive design. In 1994, she created her company, Rettore s.a.s., designing and producing her own line of jewelry.