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 Marbles were originally made by hand.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
Marble (toy) German teams have been successful several times since 2000, although local teams from Crawley, Copthorne and other Sussex and Surrey villages often take part as well; the first championship in 1932 was won by Ellen Geary, a young girl from London. There are various types of marbles, and names vary from locality to locality. Marble players often grow to collect marbles after having outgrown the game. Marbles are categorized by many factors including condition, size, type, manufacturer/artisan, age, style, materials, scarcity, and the existence of original packaging (which is further rated in terms of condition). A marble's worth is primarily