[Updated: 14 March 2016]
Minerals: Multi-mineral content. Some minerals include Carbon (black), Cobalt (blue/green), chromium (green/blue), copper (green/blue), iron oxides (red, brown, yellow), manganese (pink, orange), manganese oxides (black, yellow).
Introduction: Petrified Wood as its moniker suggests is a special type of fossilized remains of terrestrial vegetation where ancient trees or tree-like plants have completely transitioned from organic to inorganic matter (stone) through a process called permineralization. The petrification process generally results in a quartz and chalcedony mineralization. One of the many reasons why Petrified Wood is a multi-mineral fossil is because of a special and rare condition whereby the trees or plants get buried in an oxygen-free environment and the constant contact with mineral-rich waters replace the organic plant tissues with inorganic materials.
Benefits: Petrified Wood is indeed an ancient tree and thus contain lots of information of the ancient plant kingdom. Working with Petrified Wood helps an individual to ground him or herself, as energetically it's akin to having 'roots' that grow deep into the earth. Petrified Wood is also highly beneficial as it is a multi-mineral fossil with thousands of minerals embedded in it.