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 Marbles were originally made by hand.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) even if it was not the marble you had originally intended to hit. Of course, the ploy was to hit the particular opponent marble 3 times, and then 'run away' to the bunny hole, because once you rested the marble into the hole, you immediately had your shot again, thus leaving no opportunity at all for your opponent to retreat his/her marble before "the Kill" was made on it. In India, there are many games with marbles. One simple game with marbles is called "Cara" in which every player puts one or more marbles in a long line of marbles