The item for sale is a single polished crystal tumblestone, the photograph is  an example of the stones we have in stock.  I've added a penny to the picture to show scale, the origin of this crystal is Madagascar.

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.