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Every curling stone used at the Winter Olympics was made on an uninhabited Scottish island

Kays Curling in Scotland produces 38 stones weekly from Ailsa Craig granite, prized for hardness and moisture resistance, exclusively approved by the World Curling Federation.

  • At the Olympics, Kays Curling, the only supplier for competition, uses Ailsa Craig granite to make all curling stones, confirmed by director Jimmy Wyllie.
  • Ailsa Craig granite is prized because it is exceptionally hard, pure, and resists cracking and condensation, providing heat and moisture resistance for consistent glide on ice, and curling stones have been made from the uninhabited island's two sources for at least 200 years.
  • Kays Curling's workshop in Mauchline produces about one stone per hour, inspecting each to meet Olympic specs of 20kg, 278mm width and 136mm height.
  • High demand concentrates supply on the Scottish firm as the World Curling Federation requires Kays stones, drawing public attention during the Olympics.
  • Both Canadian teams faced accusations of double touching, leading to stoppages, warnings, hog-line monitoring for 3 ends, and potential sanctions, after the Saturday incident involving Rachel Homan.
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Every curling stone used at the Winter Olympics was made on an uninhabited Scottish island

The curling events at the Milan Cortina Olympics are well underway —  and all of the stones used originate from a tiny Scottish island.

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WCVB broke the news in Boston, United States on Thursday, February 19, 2026.
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