Most modern curling stones are made from very specific types of granite quarried in just a couple of places, mainly in the UK.

Quick Scoop: Where curling stones come from

  • The classic source is Ailsa Craig, a tiny uninhabited island off the west coast of Scotland in the Firth of Clyde.
  • The granite there (especially “Blue Hone” and “Ailsa Craig Common Green”) is unusually dense, tough, and very low in water absorption, which stops it from chipping or eroding on ice.
  • A small factory in Mauchline, East Ayrshire, Scotland (Kays Scotland) has been hand‑crafting top‑level and Olympic curling stones from this granite for over 170 years.
  • Another important source for non‑Olympic stones is the Trefor quarry in Wales, which also produces a suitable, very hard granite used for curling rocks.

Put simply: the stones for high‑end and Olympic curling are made in Scotland from Ailsa Craig granite, with additional stones also made from special granite from Trefor quarry in Wales.

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