On March 18, 2017, Kate wore this necklace in Paris.
From the website: “Designed by Louis Cartier in 1924, the Trinity ring is a signature design of the Cartier Maison. The three interlaced bands in pink, yellow and white gold symbolize love, fidelity and friendship. The ring has inspired the full Trinity collection, a timeless testament to life’s most memorable loves.
Trinity de Cartier necklace, 18K white gold, 18K pink gold, 18K yellow gold.”
As with the other Trinity pieces, this pendant is composed of three rings fitted together in an imbricating manner. The rings are made of yellow, rose and white gold and hang on a yellow gold chain.
Here it is on Kate:
The cost of this is $1,890.