Zirconium is a chemical element with the symbol Zr and atomic number 40. It is a shiny, gray-white metal that is strong and resistant to corrosion. Found primarily in the mineral zircon, zirconium is often used in various industrial applications, including nuclear reactors and chemical processing equipment, due to its durability and ability to withstand high temperatures. In addition to its industrial uses, zirconium is also utilized in the production of zirconia, a ceramic material known for its hardness and thermal stability. This makes zirconia valuable in dental applications, such as crowns and bridges, as well as in jewelry, where it is used as a diamond substitute.