It is the resilience and molecular makeup of Ailsa Craig Common Green granite, as well as its proven track record, that creates some of the distinctive characteristics to our complete Ailsa Craig curling rocks.

To create the best rocks you require the finest materials and to this end we harvested 1500 tons from Ailsa Craig of the Common Green Granite and 270 tons of Ailsa Craig Blue Hone so as to satisfy our customers’ demands.

Our Kays Curling rocks are made by matching the characteristics of these different granites and combining them enables us to produce the world class competition curling rocks.

Over the years our craftsmen have researched the most suitable granites for the various parts of the curling rock.

This extensive research proved that Ailsa Craig Blue Hone granite is the most reliable and proven to be the only EFFECTIVE material for the rock's running edge on todays modern ice.

The Ailsa Craig Common Green Granite is used for the body of the rock because its unique structure is more resistant to heat transfer, it copes better with condensation and does not splinter after contact with another rock in play, all of which badly affect Blue trefor curling rocks.

The Blue Hone insert is fitted to the Ailsa Craig Common Green rock body, a technique we have perfected and called "Ailserts".

Throughout the manufacturing process each rock is subject to numerous quality checks to ensure they meet the highest quality standards.