Zirconium

CAS Number: 7440-67-7. A grayish-white, shiny metal that is used
in the manufacture of cast iron and steel, as well as the
production os surgical appliances and superconductive magnets.
The oxide form of Zirconium (zircon) has a high index of
refraction and is therefore used as a gem. Chemical formula = Zr.
Molecular weight = 91.22 g/mol.