Pyrite Sun
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Pyrite suns or pyrite dollars are an unusual pyrite formation exhibiting striations radiating out from the center like rays of the sun. The current consensus is that they are simply formed due to the enormous pressure compacting the slate, and causing pyrite to grow laterally in a radiating manner. Pyrite suns are found about 300 feet deep in the coal mines, in narrow seams of shale lying on top of the coal vein. They have been researched by the Smithsonian and have been proven to be pyrite, iron sulphide, approximately 350 million years