*used for child's toy or decration *different colours for glass marble *normal size are 16mm,25mm. *used for childen toy or decration,such as vase,fish jar,swimming pool,etc.*Colour: different colours,such as white,sea blue,sky blue,green,pink,amber,yellow,red,black,etc*Materail: porcelain and transparent.*Size: 16mm,25mm are normal size ,other different size are available. sesame glass marbles