Dear Faldage: when I was in grammar school, there was a very wide social difference between an "aggie" and a "marble". Only the lowest of the plebians bothered with marbles,which, despite the name were to us half inch clay spheres, often unglazed. The aggies were multicolored glass spheres with brilliant internal swirls of color.
You really had class if you were willing to risk "popping" with "aggies". And a loaf of bread sized bag of "aggies" was proof of social superiority.