The exact same 'slabs' that are used extensively in the coin industry were being used for casino chips by the slabbing companies that floated their trial product a few years ago.

The term 'Slab' has become a commonly accepted generic term ... much like "Band-Aid". There are several different slabbing companies using the same basic technology to produce the 'slab' ... whether a U.S. government coin is housed inside ... or a casino chip.