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 Marbles were originally made by hand.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) smaller marbles and the players have bigger marbles for hitting the line of smaller marbles.This game needs the playground to be flat and hard and with no loose soil for effecting games of "Cara". The number of players can be anywhere between 2 to 30. The distances of the marbles thrown determine order of players who get to hit the line are anywhere from 10 to 30 meters and may depend on player's desire to hit the marble line first and how much risk they will take so that they would be at some distance and yet be able to