Lead is named from the Anglo-Saxon lead, the symbol comes from the Latin, plumbum. Lead has been known since ancient times and is mentioned in the Book of Exodus from the Bible. Native lead occurs in nature but is rare. Lead is obtained chiefly from galena by a roasting process. Anglesite, cerussite and minium are other common lead minerals. Lead is a bluish-white metal of high luster, is very soft, highly malleable, ductile and a poor conductor of electricity. It is very resistant to corrosion. Large quantities of lead are used in the production of storage batteries. The metal is also used for cable covering, plumbing, ammunition, sound shielding and radiation shielding around x-ray equipment and nuclear reactors.