Looks like some kind of petrified fossil packed full of minerals... Was it found directly in the middle of the crop-circle or somewhere else within it? You could take it to the local university and ask a geologist. They know minerals and rocks. I personally haven't seen anything like that though. Great find and welcome to Aliendisc!
Pyrite Sun is named after the radial formations of pyrite known as pyrite suns. ... Pyrite sun is one of the strongest, and most positive energy stones. The name is derived from the Greek pyros, meaning "fire," because it sparks when hit with force against stone or metal.