Most modern curling stones used in top-level play come from granite quarried on a small Scottish island called Ailsa Craig , off the west coast in the Firth of Clyde.

Quick Scoop: Where Do Curling Stones Come From in Scotland?

The Scottish source

  • The classic answer to “where do curling stones come from in Scotland?” is: Ailsa Craig , an uninhabited volcanic island about 10–16 km off South Ayrshire in the Firth of Clyde.
  • The island’s hard, very uniform granite has been prized for curling stones since the 1800s because it resists chipping, absorbs little water, and stays smooth under repeated impacts on cold ice.

The special granite

  • Curling stones are made from specific types of Ailsa Craig granite, often described as Ailsa Craig Common Green (for the main body) and Ailsa Craig Blue Hone (for the running surface that actually contacts the ice).
  • This combination gives stones toughness in the body and a fine, consistent sliding surface, which is why they can stay in competitive use for decades.

Who actually makes the stones?

  • A Scottish company called Kays of Scotland (Andrew Kay & Co., founded in 1851) holds the exclusive rights to quarry Ailsa Craig granite and turn it into curling stones.
  • Kays is the official and sole supplier of stones for World Curling Federation competitions and the Winter Olympics, so every Olympic stone you see has its origins on Ailsa Craig and is finished in Scotland.

Are they only from Scotland?

  • At club and recreational level, some stones also use granite from Trefor Quarry in North Wales , a second favored source, but elite Olympic sets now rely entirely on Ailsa Craig stone.
  • Historically there was more mix-and-match, but since the 2000s, Olympic stones have standardized on Ailsa Craig granite crafted in Scotland.

Little storytelling moment

Imagine a stone’s journey:
Granite is cut out of Ailsa Craig’s ancient volcanic rock, ferried by boat to the mainland, sawn into “cheeses” (cylinders), then slowly turned, shaped, and polished in a Scottish workshop until it becomes the precise 19–20 kg stone you see gliding down Olympic ice. Each one carries a tiny piece of that lonely island into rinks all over the world.

TL;DR:
When people ask “where do curling stones come from in Scotland,” the answer is mainly the volcanic granite of Ailsa Craig , quarried under exclusive rights by Kays of Scotland and crafted into the stones used at the Olympics and top competitions.

Information gathered from public forums or data available on the internet and portrayed here.