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
Elgin Marbles "As with anything stolen or taken from occupied or colonial possession – including artefacts looted from other countries in the past – we should be engaged in constructive talks with the Greek government about returning the sculptures." Following the 2016 United Kingdom European Union membership referendum, it has been suggested that the United Kingdom may be forced to return the marbles to Greece as a precondition for an agreement on Brexit, as any agreement between the European Union and the United Kingdom has to be approved by European Union member Greece. Elgin Marbles The Elgin Marbles (), also known as