I learned this from a book...Exact sentence!!:The Petrified forest in Arizona features a landscape of fossilized trees of stone sparklinh like gems in all the colors of the rainbow.It was formed 225 million years ago when tall conifers fell and were coated with mud,sand,volcanic ash,and silica-rich water. this is not featured in a musuim,But I thought you'll find it interesting :3 HOI! I'M tomie!