Want a unique gift? Well check out our unusual coasters that are laser engraved the pi to 250, 500 and 1000 decimal places!
Our unique Pi Coasters are made using high quality Welsh slate from the mountains Snowdonia, finished in black and laser engraved.
Engraved to 250, 500 and 1000 decimal places, these are a great gift for you or your friends.
Available as an individual coaster or choose our set of 3 with a free gift box.
Each coaster has a diameter of 82 mm and is supplied with felt backing.