Casually, the royal added a £50,000 Cartier Trinity Necklace with an 18-carat chain. The 18-carat chain has pavé diamonds as well as three intertwined circles of pink, yellow and white gold.

And while this one has a diamond-studded bezel, there are plenty of others without the rocks. In fact, there are a whopping 73 different Panthère references on the Cartier site at the moment.

A different array of vivid colors is showcased in the opal, amethyst, spessartite garnet, tiger eye and diamond ... Cartier ...