Designed by Patrice Leguéreau, director of Chanel’s Fine Jewellery Creation Studio, the collection is the first of its kind to be dedicated solely to a perfume. It comprises 123 jewellery pieces in all, each one inspired by the many different facets of the No 5. The pièce de résistance is the 55.55 necklace, an exquisite creation in diamonds and white gold that faithfully captures all the beloved features of the No 5.

At the heart of the necklace is an enormous, emerald-cut diamond, painstakingly cut to weigh 55.55 carats. The gemstone, which is of the highest grade in both colour and clarity, is set in an 18-carat white gold bezel, forming the necklace’s magnificent pendant. And that itself is framed by the remarkable silhouette of the Chanel No 5 perfume bottle, which ends in a cascade of pear-shaped diamonds.

The rest of the high jewellery necklace is equally mesmerising, with even more aspects of the perfume to be found. Just above the pendant, you’ll spot the perfume’s stopper, recreated in white gold and diamonds. The whole thing is clasped together with a fastener shaped like the number five — Coco’s lucky number — which is likewise embellished in diamonds.