Pyrite Sun is also known as Miners Dollars. Unlike Pyrite that is found worldwide, Pyrite Sun is found only in Illinois in the Coal Mines around the town of Sparta. Because of the limited source, Pyrite Sun is highly collectible. Measures 2 3/4 X 2 1/2 inches. Weighs 64 grams/2.3 oz Stand not included The Pyrite Sun Crystal structures formed deep underground under great pressure about 350 million years ago. These round disks sometimes occur between seams of coal and may be found when coal is mined. Although Pyrite is quite common worldwide, the disc form is virtually unique to Illinois, making Pyrite Sun very collectible. From my no pet, non-smoking home.