I have quite an intriguing mystery. This post is completely honest and serious, not a joke. There has been an interesting rock in my back yard path for some time. I knew it was some form of petrified wood from what I could see exposed and have been meaning to dig it the rest of the way out and check it out for some time, well I finally got around to it yesterday. It is rock, it is cool to the touch and feels like rock and is hard and heavy like rock. By it's shape we wer...e thinking it is petrified branch or root or bone or maybe even poop. Upon cleaning it up (washing the dirt off) we noticed the metallic looking areas w/ vigorous scratching it can be flaked off, but not easily. Does anyone have a clue????? Do not post ideas until you have looked at ALL THE PICTURES, seriously there is an even bigger mystery in the pics. Feel free to share this post especially if you have some rock hound friends, we are fascinated and would like to know a real answer. This side was the most exposed has less metallic but the lighter areas are really metallic This side really made us think bone This was the most buried and has the most metallic One end, no real tree rings are obvious The other end, no rings here either, but definitely a bone look except ............................................. Look closely, do you see it There are letters in the rock!!!!!!!! This is just to show size.