Abstract: A core sample box for diamond drilled core samples is integrally molded from a plastics material to form an inner core engaging layer and an outer layer adjacent thereto but separated therefrom. The inner layer defines a plurality of part cylindrical receptacles for receiving the cylindrical cores. The outer layer is spaced from the outer surface of the core engaging layer so that the two layers together forms sufficient rigidity to hold the device against twisting. Further rigidity is provided by connection points between the outer layer and the base of the receptacles molded into the outer layer.