Zirconium (or /zɜrˈkoʊniəm/)'s a chemical element with the symbol Zr and atomic number 40. It's a lustrous, gray-white, strong transition metal that resembles titanium. Zirconium's used as an alloying agent due to its high resistance to corrosion. It's never found as a native metal; it's obtained mainly from the mineral zircon, which can be purified by chlorine. Zirconium was first isolated in an impure form in 1824 by Jöns Jakob Berzelius. Zirconium has no known biolo… (More on Zirconium)