Pi Solid Copper Coin

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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 wi th 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. Show more