Tiffany & Co. 2021 Blue Book Collection, Colors of Nature: Coloured gems take the spotlight Share An unexpected palette of rare gemstones celebrates the enchanting beauty of the natural world in Tiffany & Co.’s 2021 Blue Book Collection. Allyson Klass discovers the exceptional pedigree of these coloured stones in this exclusive interview. The most important – and most challenging – criteria is finding a gemstone that is truly exemplary, something that takes your breath away. It’s often more about a feeling you get, which can be very personal. Each gemstone needs to have something magical, an inner beauty that draws us in. Only then do we know that they are truly of Tiffany calibre.” This quote by Victoria Reynolds, chief gemologist at Tiffany & Co., perfectly sums up the luxury jeweller’s highly anticipated 2021 Blue Book Collection, Colors of Nature.