Marbles can be used for a variety of games called marbles. Stone or ivory marbles can be fashioned by grinding. Then the coloured marbles are put back. In the Czech Republic, there are old cobblestone paths with colored marbles and limestones. The interior is richly decorated with various coloured marbles. Metamorphic rocks such as schists, marbles, and amphibolite are also widely found. Corundum occurs as a mineral in mica schist, gneiss, and some marbles in metamorphic terranes. New lampworking techniques led to artistic applications such as contemporary glass marbles. Each team consisted of four marbles of matching colors and patterns. Cohn initially played jazz piano with the Loose Marbles. Portions of its marbles and decorations were removed. Think of an urn with two types of marbles, red ones and green ones. Repeat this process until there are 20 new marbles in the second jar. Games played are reminiscent of marbles and jacks. Consider this jar of marbles as the starting population.