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Dictionary Suite
aggie a playing marble made of, or made to resemble, agate.
chalcedony a variety of quartz that is made of up of microscopic fibers that can come in several different colors and forms, which all have specific variety names. The colorfully banded variety of chalcedony is called agate.
marble a very small ball, of glass or agate, used in a children's game. [1/7 definitions]
moonstone a white agate. [1/2 definitions]
moss agate a type of agate or chalcedony with black, brown, or green mosslike markings caused by impurities.
silica a crystalline compound of silicon and oxygen that is widely found in quartz, agate, sand, and the like, and used in making glass, concrete, and ceramics.