Abstract: The method of making an improved ornamental plastic product incorporating lamellar material oriented in a selected disposition, which includes the steps of subjecting the resinous mass containing the lamellae to an orienting influence, and thereafter subjecting the mass to a high speed beam of electrons sufficient at least partially to cure the resin and immobilize the oriented lamellae to prevent their migration from the selected disposition. The resinous mass containing the lamellae is preferably cooled prior to orientation, and irradiated while still in the cooled state.