Tiffany & Co. Paloma Picasso Aquamarine Rubellite Ring

A polished 18K gold ring by Tiffany & Co. The ring is adorned with an oval-cut aquamarine and rubellite tourmaline, each weighing approximately 5.75-6.00 carats. Signed 'Tiffany & Co.', 'Paloma Picasso', and marked 750. Size 5.