Rose gold became popular in the late 1800s when Russian jeweler Karl Fabergé discovered that mixing 25% copper with 75% gold created a beautiful pinkish hue. The Fabergé Egg, commissioned by the Romanov Royal Family, helped spread the popularity of rose gold in Russian jewelry. It was initially known as 'Russian gold' and has since gone in and out of style over the years but has maintained its status as a timeless and unique choice in jewelry.