cents (the us does not have pennies --but we americas call em that as a hold over from english colonial days) new "junk" type copper coated zinc cents made after 1982 are nick named "zincolns" short for zinc lincons and nobody likes em they are eatten up badly once lost in ground -- "clad " is a term normally used for coins that used to be 90% silver in 1964 and before but were changed to a copper core with a shiny silver looking "outer coating" stamped on them (if you look at the side edges of these coins you can see the copper core )--coins like dime , quarter and halves* (after 1970 -- from 65 to 70 they were 40% silver still)--- since clad has no silver value and is of recent date it is basically though of as spending money / pocket change by most detectorist.