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Sale price$20.64

An irrational coin

Feeling irrational? It may be a sine to take some deep breaths and trace pi's digits by hand for a calming sensory experience.

The number pi (π) is a mathematical constant, approximately equal to 3.14159. It is defined in Euclidean geometry as the ratio of a circle’s circumference to its diameter.

Included:

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

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.

Each Pi coin comes in its own wax-sealed packaging with useful and useless pi facts.

Engraved by Woody Maringer.  Learn more about our artists.

© Shire Post Mint. All rights reserved.

Customer Reviews

Based on 16 reviews
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D
Diana M.
Phi

The copper phi coin is chunky. The number phi on the reverse is impressive!

H
Heri R.
Excellent 👌🏽

I am very satisfied with this Pi 3.14 Coin, it is elegant and magical. Thank you very much and congratulations

J
Jim

Amazing detail.

K
Kenneth

Really good !!!

G
Greg
Great coin.

Wish there was a silver one available.

Pi Day 3.14 Coin in Copper | Shire Post Mint
Pi 3.14 Coin in Copper Sale price$20.64