Petrified wood (from the Greek root petro meaning "rock" or "stone"; literally "wood turned into stone") is the name given to a special type of fossilized remains of terrestrial vegetation. It is the result of a tree or tree-like plants having completely transitioned to stone by the process of permineralization. All the organic materials have been replaced with minerals (mostly a silicate, such as quartz), while retaining the original structure of the stem tissue. Unlike other types of fossils which are typically impressions or compressions, petrified wood is a three-dimensional representation of the original organic material. The petrifaction process occurs underground, when wood becomes buried under sediment or volcanic ash and is initially preserved due to a lack of oxygen which inhibits aerobic decomposition. Mineral-laden water flowing through the covering material deposits minerals in the plant's cells; as the plant's lignin and cellulose decay, a stone mold forms in its place. The organic matter needs to become petrified before it decomposes completely. A forest where such material has petrified becomes known as a petrified.
Petrified wood is a stone that is good for grounding and stabilizing one’s emotions. It is particularly useful in calming survival-based fears. It helps one be practical. It is a stone of business success. Petrified wood is a good stone for general protection. Physically, it is used in crystal healing for the bones, backaches, skin and hair. Please note that healing crystal meanings are presented as spiritual supports to healing and are not prescriptions or healthcare information. Petrified wood is also used for past life regressions because of its inherent link with the past.