The sandpaintings are made from sandstone and minerals that are ground to a fine consistency and applied one layer at a time to a wood backing with a special glue mixture. The sand is not painted. The design may depict one of the many traditional healing designs or a contemporary theme such as still-life and landscapes. The quality of a sandpainting is determined by the complexity of the design and the fineness of the materials used. Finely ground sand and the skilled hand of the Navajo artist produce beautiful works of art.