Spirit Stone (aka Yavapai Travertine) This is called Spirit Stone by the Navajo Native Americans, because they believe history is told in its layers. It is a highly spiritual stone giving access to the wisdom of past lives. It aids in the completion of emotional cycles and allows one to keep the lessons and release the drama and ego attached to those cycles. This semiprecious stone material is from the Paleozoic Period or about 320 million years old.