This November, Sotheby’s will offer a unique masterpiece of high jewellery: a stunning necklace by Adler Joailliers, conceived and created expressly for ‘The Blue Lagoon’, the largest, top-quality Paraiba tourmaline ever to be offered at auction. At an outstanding 93.94 cts, this treasure of nature dazzles at the heart of the bespoke necklace to be offered as a star lot in the Magnificent Jewels and Noble Jewels sale in Geneva on 8 November (estimate 1.3 – 2.5 million CHF / 1.4-2.7 million USD). The auction part of Sotheby’s Luxury Week, a twice-yearly seasonal series staged in Hong Kong, New York and Geneva, offering the most extraordinary lots across jewellery, watches, handbags and accessories and more.