Two years later, I still find them.

Two weeks ago I picked up several cherts which were close to each other. After washing one of them I discovered it had the shape of a bird sitting on her eggs. The bird was done on both sides. When I pick up a rock, I look at it, on all sides. Slowly, many times, from many angles, at different times of the day. Sometimes I'll take it in my car. When I am parked, if I have a couple of minutes, I will look at it again. Many times a little face will jump at me because the rock is now situated at exactly the right lighting and position to reveal it. And then I will lose that face later on and I will have to spend more time searching for it. Well, on that little bird, I counted 10 faces.