Rose Gold

Rose gold is gold mixed with a raised proportion of copper. In 14k rose, gold makes up 58.5 percent as it does in any 14k. Most of the remaining 41.5 percent is copper rather than silver, and that copper is the pink. Push the copper higher and the metal moves toward red gold; pull it back and the color drifts toward yellow.

Because the color is the alloy and not a coating, it cannot wear off, rub through or need re-plating. Copper also hardens the mix, so rose gold resists scratching slightly better than yellow gold at the same karat. That hardness has a limit. Copper rich alloys are less forgiving when bent, so tell a jeweler the piece is rose gold before a resizing. The metal needs annealing, a controlled heating, to avoid cracking.

Rose sits between warm and cool, which is why it mixes with both yellow and white in a stack and suits most skin tones. Two caveats follow. Copper slowly darkens, so a rose gold piece decades old reads deeper and browner than it did new, which some people want and some do not. And copper is a contact allergen for a minority of wearers, so rose gold is not automatically the gentle choice.

Rose gold is made in the melt. Refined gold is combined with copper and a smaller amount of silver, and the ratio alone decides the shade. A common 14k rose recipe runs roughly three parts gold to two parts copper, while red gold pushes the copper higher still. No plating step exists, because the color belongs to the metal itself.

The alloy is cast from a wax model or rolled into sheet and formed, then filed and polished. Copper rich gold work hardens quickly under hammering and bending, so the bench worker anneals it. Annealing heats the metal until it glows dull red and lets it cool, which resets the internal structure and prevents cracks. That step is also why a rose gold ring should be resized by someone who knows what the metal is before they start.