A 6.91 carat cabochon-cut star sapphire on paper, Burmese, unheated according to GGTL report n°24-G-27968 dated 18/01/2024, with a platinum mounting set with brilliant-cut diamonds, finger 53-13 According to report: 11.54x8.67x6.44 mm Mounting signed Collet, scratches and micro-scratches on the platinum. The stone has been repolished and its size slightly reduced. Brigitte Mavromichalis Collection (1926-2015) - March 2024 Sale Brigitte Mavromichalis, née Wiman (1926-2015), a highly cultured, independent woman and avid bridge player, spent her life collecting. Born into a large Swedish family, she met her husband Constantin in Lausanne, where she was studying. The couple settled and remained in Switzerland. A great patron of the arts, she made a name for herself with institutions and museums such as the MAH in Geneva, the Fondation Giannada in Martigny and the Musée d'art du Valais in Sion, thanks to her generosity and discretion. The lots included in the catalogue come from the estate of Brigitte Mavromichalis. They follow the sale organised by our firm in June 2023 in Geneva. They can be found on Piguet.com by searching for the keyword mavromichalis .