The curling stones are made of granite and weigh 42 pounds.
Curling stones are the most important part of the game, and they’re very unique in that they are made of granite. They also have a handle at one end to help players control them. While they look like rocks, they’re actually much lighter than you might think, weighing just 42 pounds (19 kilograms). The granite used to make them is very specific as well, with it having to be sourced from a quarry in Scotland. It’s called Perthshire Blue Granite and has been used for centuries for making curling stones.
The granite is also special because it has to be a certain shape so that it will curl properly when thrown down the ice. The reason why curling stones have lights on them is because when you’re throwing them down the ice, you need to be able to see where they are going.
