Marble (toy) conventions. Additionally, many glass artisans produce art marbles for the collectors' market only, with some selling for thousands of dollars. Marbles are made using many techniques. They can be categorized into two general types: hand-made and machine-made. Marbles were originally made by hand. Stone or ivory marbles can be fashioned by grinding. Clay, pottery, ceramic, or porcelain marbles can be made by rolling the material into a ball, and then letting dry, or firing, and then can be left natural, painted, or glazed. Clay marbles, also known as "crock marbles" or "commies" ("common"), are made of slightly porous clay, traditionally
Elgin Marbles Museum includes the following material from the Acropolis: The British Museum lent the figure of a river-god, possibly the river Ilissos, to the State Hermitage Museum in Saint Petersburg to celebrate its 250th anniversary. It was on display there from Saturday 6 December 2014 until Sunday 18 January 2015. This was the first time the British Museum had lent part of its Elgin Marbles collection and it caused considerable controversy. In a 2018 interview to the Athens newspaper Ta Nea, quoted later in The Independent, the British Labour party leader Jeremy Corbyn vowed to return the Marbles to Greece, stating