Names
Agate marbles were glass and had different names. There were cat eyes, solids, rainbows, clearies and steelies. Cat eyes were the sought after marbles that opponents wanted to win for their collections. Clearies were used regularly if kids didn't want to lose their steelies or cat eyes.
Sizes
Marbles were different sizes. Generally, children had all different sizes, but the prize marbles were the one-inch diameter marbles, which were larger and could cover more space when trying to win a marble from an opponent. Other sizes were 3/4-inch, 5/8-inch, 7/8-inch and 9/16-inch.
Characteristics
Cat eyes are clear with a color wedge inside the marble that resembled a cat's eye. Rainbows were marbles of multiple colors. Solids were opaque marbles of a one color. Clearies allowed light to pass through. Marble colors ranged from white to purple, with many colors in between.
Steelies
Steelies weren't exactly marbles, but solid steel balls used as marbles to overtake the opponent's marbles or steelies. Steelies were one-inch in diameter; small steelies were one 1/2-inch. The smaller steelies were harder to hit, but had the power to hit the opponent's marbles.