Cubic zirconia is the world’s most popular simulated diamond. It is super affordable, yet the naked eye cannot distinguish between the real thing and the simulation. Popular colorful CZ colors are yellow, hồng, màu đỏ, màu xanh da trời, đen, Champagne, chocolate, and green. Sterling silver is the perfect metal to pair with colorful CZ stones for a wealthy look at an inexpensive price tag.