The fruits of the ivory palm tree <i>(Phytelephas macrocarpa)</i>, called tagua nuts, are indigenous to the equatorial regions of Central and South America. The nuts have been used as an ivory substitute for about 160 years by craftsmen in various parts of the world. The average nut is about 1-1/2 inches long and 1-1/4 inches in diameter and is rounded with four flat sides and a stem end that is slightly concave. The article is primarily concerned with techniques for turning the nuts into small vessels using a lathe, citing techniques developed by Clead Christiansen. Concern about the use of ivory by craftsmen and conservators has generated new interest in ivory substitutes with satisfactory aesthetic qualities. The article also lists suppliers of tagua nuts.