Pyrite Sun is also known as Pyrite Dollar or Miner's Dollars. They are often mistaken as a fossil. A pyrite sun is just pyrite and are found by the coal miners in Illinois. They find them between tightly spaced layers of shale roughly 300 feet below the surface formed under great pressure between the layers of the shale. Under normal conditions, pyrite would form cubes or cubical like structure.
This particular pyrite sun is a spectacular specimen. It is fairly large and displays a wonderful iridescent reflection combined with a somewhat tarnished finished.
10.5 cm x 10.5 cm