VANCOUVER, British Columbia – Jutting its rounded self from the waters off the west coast of Scotland is Ailsa Craig, an uninhabited 104-acre island that’s home to the only known supply of the granite needed to make a proper curling stone.
It’s called blue hone granite – an intensely hard substance that is uniquely suited to slide smooth and true down a 146-foot long sheet of ice, withstand countless crashes into other stones and prevent even trace amounts of moisture to seep into it. That would cause it to pit and thus move unpredictably.
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