To vary the color of an ornament at low cost using an inexpensive material having optically active properties which can be easily prepared by injection molding and punching.

A polarizing plate 2, a turntable 5, a polarizing plate 1, and a white light source 3 are disposed in a row as seen from an observer 6. The polarizing plates 1, 2 are set at right angles to the direction of the axis of polarization. A colorless and transparent three-dimensional ornament 4 made from a material having optically active properties is placed on a turntable 5.