Anyhow petrified wood is a fossil. belonging to the fifth element of spirit or Akasha. In spell use it is used in life related spells including past incarnations. also it serves as a protective barrier angainst negativity. also a connection to the natural world.

in healing it stablilizes the health and body's defenses. It gives a calm feeling over the holder.great for regressive work regarding the world of plants and the earth in general.
also good for people who have issues keeping living plants to place some in planters or gardens and it seems to work well for most.

also in a circle of 4 or more pieces it can awaken lost energies.

Usually the wood is replaced by another minerial. either agate or quartz. Also a stone of transformation. A stone for the 1st chakra. Recharging it best by quartz. Cleansing it best by water

fossilized / petrified peanut wood: helps taking life the way it is, helps to find content in life, helps to use changes from the outside to support one owns goals in life

opalized petrified wood: additionally gives a positive attitude towards life in general, promotes inner balance
strengthens appetite, strengthens digestion

petrified palm wood: promotes collectedness; brings emotion into flow at a stable level.
strengthens spontanous thought and fast reactions
brings balance to the metabolism