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.