Cubic zirconia is a synthetic gemstone that closely resembles a diamond. It is made from zirconium dioxide and is known for its brilliance and clarity. Due to its affordability and durability, cubic zirconia is often used in jewelry as a diamond substitute. This gemstone is created through a controlled process that allows for the production of high-quality stones in various colors. Unlike natural gemstones, cubic zirconia is not formed in the earth but is manufactured in laboratories, making it a popular choice for those seeking an attractive yet cost-effective option in pieces like rings and earrings.