Rose gold utilizes copper, the only red metal chemical element. This alloy will lose its color as it is exposed to the environment – particularly chlorine over time.
Of course, this is not ideal for a watch, and therefore, Rolex put its research and development teams and foundry men to work and started looking at a solution.
Eventually, Rolex came up with and patented their own pink gold alloy: Everose Gold. Everose gold contains at least 76% gold and a little more than 2% platinum. By adding platinum along with the gold and copper, the copper is held in by the platinum – thus ensuring that the color lasts for years to come.
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