Or Alamagordo glass or atomsite. Illegal to find some and stick it in your pocket now, believe it or not.
My grandmother, long gone, was a rock hound. She visited the Petrified forest before it was a park and picked up some petrified wood for her rock garden. Sure that’s illegal now too.
Once upon a long time ago I stayed in a hotel in Tucumcari NM, there was a courtyard that featured the petrified stumps of former trees. Other than those, I’ve only seen small samples of such.