Many opt for 18-karat gold jewelry because it is an excellent mix of purity, value, and beauty.  18-karat gold contains 75% gold, as opposed to 14-karat gold, which contains only 58.3% gold, and the rest are alloyed metals. 18-karat is the highest quality of gold one can have without having to sacrifice durability. Another advantage of choosing 18k gold is its  richer,  more vibrant color.