Agate jewelry. Baidu said that the red dragon ball is called agate ornament because its appearance and texture are very similar to agate. Agate is a kind of gem, and its color is usually red, brown or orange, which is consistent with the red appearance of red dragon ball. Moreover, agate has the characteristics of smooth and translucent texture, which is similar to that of red dragon ball, so people compare red dragon ball to agate jewelry.