Generally, Chaumet’s jewelry with an X symbol is usually from the Liens series. "X" as a symbol represents connection. The cross ring you are talking about should be the Jeux de Liens diamond ring. There are two colors: platinum and rose gold. Girls who like it can choose according to their skin color. It is worth mentioning that on the Spring Festival Gala of 2020, Zhang Yixing wore the same cross necklace. Thank you for your recognition of my answer, and I wish you good luck