Zirconium is a transition metal used mainly in nuclear reactors. It is lighter than steel and about as hard as copper, with a high resistance to corrosion.
Anglo American (NASDAQ: AAUK) - Their Namakwa Sands mine in South Africa is a major producer of zircon, which contains zirconium and hafnium.
Ucore Uranium (CVE: UCU)
ESPI High Purity Metals - http://www.espimetals.com/metals/catzirconium.htm