“Pyrite Sun” from Sparta, Illinois, U.S.A.
These extraordinary crystal structures known as “Pyrite Sun” actually 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 disk form is virtually unique to Illinois.
Origin: Sparta, Illinois, U.S.A.
Size: 112 x 77 x 8 mm
Weight: 131 gr