Navajo art medium is a term used to describe the traditional art form of the Navajo people, which is primarily created using SAND. SAND painting is an ancient practice that has been used by the Navajo people for centuries to tell stories, heal the sick, and bring good luck. The SAND is mixed with natural pigments and then carefully arranged into intricate designs on a flat surface. The SAND paintings are often used in ceremonies and rituals, and are believed to have spiritual significance.