Cubic zirconia, also known as CZ, is a synthetic gemstone that resembles a diamond. It is often used as a more affordable alternative to diamonds in jewelry. Other terms that are used to describe cubic zirconia include lab-grown diamond, CZ made, diamond simulant, and synthetic diamond. These terms are often used interchangeably with cubic zirconia and can be found in the descriptions of jewelry and gemstones. Despite being synthetic, cubic zirconia has gained popularity in recent years due to its resemblance to diamonds and affordability. It provides an excellent alternative for those who desire the look of a diamond but cannot afford the high price tag.