Disc-shaped pyrite concretion: Offers a unique and eye-catching form for collectors
Formed by lateral growth: Provides insight into ancient geological processes
Polished specimen: Enhances display and educational value
Locally sourced from Sparta, Illinois: Ensures authenticity and provenance
Summarized by Shop
Whether you call them Pyrite Suns or Pyrite Dollars, these interesting mineral formations look like mineralized sand dollars! A unique crystal formation, the Pyrite actually formed as a concretion approximately 300 million years ago. As the Pyrite was compressed between layers of shale, it was unable to grow vertically / outward, and was