Named after the jeweler’s signature shade, Tiffany & Co.‘s Blue Book dates back to 1845 as a mail-order catalog. In the early 20th century, the program evolved into an annual publication of Tiffany & Co.’s most exceptional and rare high jewelry creations. Among its famous entries throughout history are the Tiffany Diamond—which at 128.54 carats remains one of the most celebrated fancy yellow diamonds ever discovered—and Jean Schlumberger‘s 2.69-carat diamond-encrusted cockatoo perched atop a nearly 60-carat citrine “rock” brooch. This year, Tiffany & Co.’s Chief Artistic Director Nathalie Verdeille’s pays homage to the 1950s and ’60s marine-inspired works of Schlumberger, whose designs are remembered for their whimsical interpretations of natural forms. Entitled Out of the Blue, the collection just debuted in Shanghai and expands on five existing themes—shell, coral, pisces, star urchin, and starfish—while introducing one new concept: sea anemone. This latter’s eponymous bracelet is particularly desirable: it features a palette of five blue cuprian elbaite tourmalines of over 9 carats, 220 turquoise of over 41 carats and 797 diamonds of over 82 carats set en tremblant, or inverted with their culets facing outward. The process took Tiffany & Co. master artisans over 1,325 hours, and the final result offers a wondrous sense of trembling motion.