All stones in Cortina are made from granite found on tiny island in Firth of Clyde and crafted in East Ayrshire All stones in Cortina are made from granite found on tiny island in Firth of Clyde and crafted in East Ayrshire “I t takes 60m years and about six hours to make a curling stone,” shouts Ricky English above the whine of the lathes. The operations manager at Kays Scotland is surrounded by wheels of ancient granite in varying states of refinement. It is a small business with a big