The Petrified Logs are the product of an ancient forest of tropical trees that populated Indonesia 25 million years ago. They were covered and swept away by a flow of lava and volcanic ash. Over time, the trees fossilized as mineral rich water slowly flowed through the porous wood fossils and created brown, black, grey, white and yellow colors following the structure of the growth rings. These rare fossil wood logs are for sale. For more information email us at indogemstone@gmail.com