Caesalpinia ferrea, commonly known as Pau Ferro, is a tree found in Brazil and Bolivia. Its wood is often used for making Musical instruments, decorative wood items and furniture. It is also known by the names Morado, Palo Santo  and Bolivian Rosewood. It is not a true rosewood.

In guitar making, pau ferro is not only used for fingerboards and bridges but also for the back and sides of the acoustic guitar.