Swiss commemorative coin crowned the world's smallest

[Still Waters]

A tiny Swiss gold coin bearing a picture of Albert Einstein sticking his tongue out has been crowned as the world's smallest commemorative coin, Switzerland's mint announced Tuesday.

The miniature coin, with a face value of a quarter of a Swiss franc (27 US cents, 23 euro cents), measures just 2.96 millimetres (0.1 inches) in diameter and weighs only 0.063 grammes (0.002 ounces).

"Guinness World Records has recognised the quarter-franc gold coin issued in 2020 as the world's smallest commemorative coin," Swissmint said in a statement.

Claiming inspiration from the "determination and patience" of theoretical physicist Einstein, who died in 1955, the coin features the Swiss citizen in his famous pose on the obverse.

https://phys.org/news/2021-04-swiss-gold-world-smallest-commemorative.html