How Curling Rocks are Made – Ailsa Craig Island and Trefor Quarry

People are often fascinated to learn that curling stones  are made of granite from only TWO quarries in the whole world — in Scotland and Wales. The island of Ailsa Craig was the original location where curling stones were made.

Curling stones are made from three types of quartz-free granite: Blue Hone, Ailsa Craig Common Green (both found on Ailsa Craig island), and Trefor, which can be found in the Trefor quarry of Wales. Curling stones require this rare granite that has low water absorption, which prevents the action of repeatedly freezing water from eroding the stone. The stones weigh between 38-44 pounds, have a maximum circumference of 36 inches and are at least 4.5 inches high.

Link to the YouTube video on How It’s Made: https://www.youtube.com/watch?v=eUy9ake9q8w