Rose gold is obtained with an alloy of 75% gold, 20% copper and 5% silver. The tri-chromatic color in industry is 4N for pink gold, 5N for red gold, and 3N for yellow.

In watchmaking, rose gold is mainly used in the case and bracelet. It is particularly appreciated for the cases of striking watches. Indeed, the addition of copper improves its sound aspect. It is not for nothing that a certain category of musical instruments are called brass instruments.

Gold has the advantage of being stainless, which makes it a sought-after component for dressing. Moreover, historically gold has always had a role of excellence and rarity, associated with luxury it represents an important asset for a collection. The fact that gold can move in different colors allows a wide variety of colors for a model.

Gold has the disadvantage of being heavy. It is also sensitive to expansion under heat. Secondly, gold is soft and therefore can be complicated to machine, which is why it is almost never used in 24 carats but rather in 18 carats, which somewhat neutralizes its defects. If too pure, it can be sensitive to damage (shocks, scratches). The extraction of gold can be harmful to the environment depending on how it is done.