petrified wood

Fossilized wood that is often banded in color, for which it is highly valued.Because of the fossilization process, which replaces organize materials with minerals, petrified wood is essentially wood that has been turned into stone and can therefore be used to create stone artifacts, including bowls, knives, and beads. One of the richest deposits of petrified wood in North America is the Petrified Forest National Park in northeastern Arizona, near the Navajo, Hopi, and Zuni reservations.