Curling stones mostly come from very specific types of granite found in just a couple of quarries in Scotland and Wales, with one small Scottish island being the most famous source.

Where curling stones come from

  • The classic source is Ailsa Craig , a small uninhabited volcanic island off the west coast of Scotland in the Firth of Clyde.
  • Another key source is the Trefor Granite Quarry in North Wales, which also supplies stone for many modern curling stones.
  • For top‑level events (World Championships, Olympics), stones are traditionally made by Kays of Scotland , a company that has been producing curling stones since the 19th century and holds exclusive rights to Ailsa Craig granite.

Why those places?

  • Ailsa Craig granite (especially varieties called Common Green and Blue Hone) is unusually hard, dense, and resistant to cracking from repeated freezing, impacts, and moisture, which makes it ideal for gliding over pebbled ice without chipping.
  • Trefor granite (often known as Blue Trefor or Red Trefor) offers similar durability and uniform texture, so it has been used to supplement the limited and carefully managed supply from Ailsa Craig.

What are stones made of, exactly?

Modern curling stones are not random rocks; they are precision‑shaped granite “sandwiches” :

  • The main body (striking band) is usually Ailsa Craig Common Green granite, which absorbs impacts well.
  • The running surface (the narrow ring that actually contacts the ice) is often Ailsa Craig Blue Hone or a comparable fine, tough granite, chosen for smoothness and wear resistance.
  • Each stone is lathed, polished, and matched in weight and balance so a full set behaves as consistently as possible on the ice.

A quick bit of history

  • Early curlers in Scotland simply used natural river or field stones , with no handles and irregular shapes and sizes.
  • As the sport standardized in the 1800s, Scottish makers like the Kay family began producing purpose‑built granite stones, gradually converging on Ailsa Craig and later Trefor as the best material sources.
  • Since the first Winter Olympics in 1924, stones used at major championships have overwhelmingly traced their geological roots back to Ailsa Craig and, more recently, Trefor.

SEO bits (for your post)

  • Focus keyword to repeat naturally: “curling stones come from”.
  • Example meta description:

Curling stones come from rare, ultra‑durable granite quarried mainly on Ailsa Craig in Scotland and at Trefor in Wales, crafted into precisely balanced rocks for Olympic‑level play.

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