Open a newspaper of the 1920s or early 1930s and the bulk of jewelry advertisements for wedding sets promoted platinum brands. However, during world War ll, many countries, including the U.S., prohibited the use of platinum in non-military applications. Because platinum was preferred but unavailable, jewelry manufactures mixed alloys with yellow gold was also used more in its natural state and subsequently, became the choice for traditional wedding sets during the latter half of the century. As the 20th century drew to a close, white metals-sliver, white gold, and platinum, were rediscovered and once again, became popular choices for wedding sets and all kinds of jewelry.