Rose gold, or pink gold is created by alloying pure 24KT gold with copper. Pure 24KT gold is a rich yellow color by nature and copper exhibits red tones. By melting the two metals together the result is karat gold with a pink rosy tint. In addition to copper, silver is sometimes added to give the metal more workable properties and durability.
Typically 18KT rose gold will consist of 75% pure gold mixed with 25% copper, and 14KT rose gold will consist of 58.5% pure gold with 41.5% copper silver alloy.