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 Marbles were originally made by hand.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
Arundel marbles (gaps). Arundel marbles The Arundel marbles are a collection of carved Ancient Greek sculptures and inscriptions collected by Thomas Howard, 21st Earl of Arundel in the early seventeenth century, the first such comprehensive collection of its kind in England. They are now in the Ashmolean Museum, Oxford, having been donated in two groups. The bulk of the collection was a gift by Arundel's grandson Henry Howard, 6th Duke of Norfolk in 1667, at the prompting of John Evelyn and John Selden. The remainder were received in a second gift of 1755, when the extravagant 2nd Earl of Pomfret sold back