MILAN — Tiffany & Co. on Thursday unveiled the third and last chapter of the Blue Book 2025: Sea of Wonder high jewelry collection in Milan’s grand Via Montenapoleone flagship.

The collection, designed by Nathalie Verdeille, the house’s chief artistic officer of jewelry and high jewelry, continues to explore and celebrate the ocean’s organic shapes and beauty through nearly 40 new designs, and reinterpreting archival creations by Jean Schlumberger.

Unveiling the collection, Verdeille enthused about presenting in Milan what she believes can change the general perception of Tiffany in Europe, where, she argued, the brand is recognized for “its collaborations with famous designers and for its bridal range of rings, but there is so much more creativity, style and imagination to be discovered. There’s no limit to the layers of the brand, it’s so rich in inspirations and designs.” She admitted this discovery of “a pop-culture” element in Tiffany and, joining the brand four years ago, finding in Schlumberger an endless source of inspiration.

The collection comprises the Anchor, Anemone, Ocean Flora, Shell, Urchin and Mermaid suites.

The Anchor chapter reimagines Schlumberger’s ruby, amethyst and pink sapphire brooch from 1939. Each centered around cushion-cut diamonds, the Anchor pendant in platinum and 18-karat gold features a diamond of over 2 carats; the ring, a diamond of over 5 carats and the bracelet, a 1-carat diamond — all set with diamond accents.

The centerpiece of the Anemone group is a stunning necklace with sculptural gold accents and diamonds, and three unenhanced rubies totaling nearly 5 carats — sourced from Mozambique.

Tiffany‘s chief gemologist Vicky Reynolds underscored “the incredible, strong and pure” color of the rubies and the brightness of the diamonds, which add “power” to the jewel. She stressed that the brand works with “the best diamonds and gems sustainably sourced.”

With undulating curves of platinum and gold and crests set with white and yellow diamonds, the Shell brooch stands out with an 8.62-carat green tourmaline and exquisite craftsmanship.

Reynolds, who has spent almost four decades at Tiffany and is the first woman to hold the role of chief gemologist, enthused about the “incredible reaction” to the collection in Milan from clients from all over the world, after showing the previous Blue Book chapters in the U.S. “It’s been beyond our expectations,” she said, adding that several pieces had already been sold the day before and could not be shown to the press in the store.

The Urchin designs incorporate paillonné enamel — crafted using a labor-intensive technique from the 19th century — to evoke the sea creature’s iridescent textures with a luminous and layered surface.

A brooch in platinum, rose gold and diamonds depicts a mermaid in motion, accented by a black opal of over 10 carats at her fin. The motif continues in a ring, earrings and necklace.

New in the Ocean Flora chapter is a one-of-a-kind high jewelry timepiece, featuring a mother-of-pearl dial, a turquoise marker at the 12 o’clock position and a diamond bracelet that echoes the motifs seen in this chapter’s high jewelry pieces.

The Milan flagship is Tiffany & Co.’s largest store in Europe and was inaugurated in April during the city’s Design Week. It is also the flagship that displays the largest selection of exceptional archival pieces from the brand.

Located in the Neoclassical Palazzo Taverna built in 1835 on Via Montenapoleone, the striking store was designed by Peter Marino and opened after more than two-and-a-half years of works.