Yellow gold is a classic and timeless choice for engagement rings, treasured in jewelry for thousands of years. Its warm color complements many skin tones, and its durability makes it resistant to erosion. The rich color of yellow gold comes from a blend of 75% pure gold with alloys like copper and zinc. This metal is popular for both modern, delicate engagement rings and intricate vintage designs, making it an excellent option for a ring that can be passed down as a family heirloom.