Petrified wood is a type of wood fossil preserved by the process called “petrification”, meaning “to change into stone”.Generally, the species of petrified wood can be identified by examining thin section of the fossil under a microscope and comparing to cellular structure of living species.The study of fossil woods can give us the idea of what the ancient forest was like.a key to study plant taxonomy and plant evolution,a tool to interpret the past and predict the future and an archeological evidence.In 1921, King Rama VI visited the petrified wood was presented to the king as an “important” and “goodwill” gift from local people.