What is the name of Rolex's proprietary rose gold alloy?

Rolex’s proprietary rose-gold alloy is called Everose.

Everose is Rolex’s version of 18-karat pink or rose gold. Rolex introduced it in 2005 and developed it to retain its warm pink colour more effectively than conventional rose-gold formulations. The alloy is cast in Rolex’s own foundry, allowing the company to control both its composition and production.

As with all 18-karat gold, Everose contains at least 75 percent pure gold. Rolex also uses copper and other alloying elements, including palladium, but the exact formula is proprietary. The palladium helps distinguish Everose from ordinary rose gold and contributes to its resistance to fading.

The alternatives in the quiz are different Rolex terms or other brands’ materials. Sedna Gold is Omega’s proprietary rose-gold alloy, while Rolesor describes Rolex’s combination of gold and steel; White Rolesor and Yellow Rolesor are not rose-gold alloys. Everose can appear in cases, bezels, bracelets and two-tone Rolesor combinations.