Petrified wood is found on every continent in the world. Fortunately, Arizona has the largest deposit in the world so far.Petrified wood is awesome. I have a handful of pieces around, though all ones I've purchased - including a small cookie that has been polished. I would really like to find some myself someday.
Upon further investigation, it looks like there are about 15 states that don't have any deposits. ...........Jerry (in Tucson)