Feeling irrational? It may be a sine to take some deep breaths and trace pi's digits by hand for a calming sensory experience. Each Pi coin comes in its own wax-sealed packaging with useful and useless pi facts. 

- Pi coin minted in solid copper in West Fork, AR 
- Solid Copper - 29 g, 1.54 in (3.9 cm) diameter 
- Antiqued patina
- Engraved by Woody Maringer

This heavy copper coin feels good in the hand and the pocket. The copper coin blank is pre-tumbled before minting for a smooth edge and then given an antiqued finish. 

The coloring/patina process is done by hand, and it is both an art and a science so coins will vary slightly. Coins are struck one at a time in the USA using antique machinery and traditional coining techniques.