white base with flecks of green color. They are iridized to have an extra shiny reflective surface. Marble pictured is a stock photo of a Moon Marble Co. marble of this type. Marble received may vary slightly. Machine marbles vary one marble to the next, even in the same batch. Due to the machine process marble sizes will vary slightly. Warning!: Choking Hazard. This toy is a marble. Not recommended for children under 5 years. Large marbles can be hazardous to your toes when dropped.