Marble (toy) Required" and "The Colbert Report". Currently, the world's largest manufacturer of playing marbles is Vacor de Mexico. The company makes 90 percent of the world’s marbles. Over 12 million are produced daily. Marbles are also made in China and may contain lead, arsenic, and/or cadmium due to the manufacturing process of old glass. Art marbles are high-quality collectible marbles arising out of the art glass movement. They are sometimes referred to as contemporary glass marbles to differentiate them from collectible antique marbles, and are spherical works of art glass. Collectible contemporary marbles are made mostly in the United States by
Arundel marbles Ancient Greece as standard units of measure. Another important object from Arundel's collection is the so-called Arundel Head, an Hellenistic bronze portrait of a philosopher or king from Asia Minor now in the British Museum. The Arundel marbles were catalogued as early as 1628, when, at the suggestion of Sir Robert Bruce Cotton, John Selden compiled a catalogue: "Marmora Arundeliana" with the assistance of two others, Patrick Young and Richard James. In 1763 Richard Chandler published a fine edition of the inscriptions as "Arundelian Marbles, Marmora Oxoniensia" with a Latin translation, and a number of suggestions for filling the lacunae