1/10GENEVA, SWITZERLAND - MAY 06: The largest Kashmir sapphire ever to appear at auction goes on view in Geneva, ahead of Sotheby's Geneva's flagship jewellery sale on 11 May. The 55.19-carat oval gem, set in a 1930s sapphire and diamond brooch, alongside a 25.97-carat cushion-shaped Kashmir sapphire comes from the Maureen Constance Guinness, Marchioness of Dufferin and Ava (1907-1998), one of the famous 'golden Guinness girls' (Estimate: $2-3m (CHF 1.9 2.8m). (Photo by Robert Hradil/Getty Images for Sotheby's) Forrás: Getty Images for Sotheby's/2021 Getty Images/Robert Hradil