Around 2000 tons of granite is being removed from the Ailsa Craig - but no new quarrying will take place during the operation.
Kays of Scotland are collecting and removing granite boulders that are already lying on the island.
No new quarrying will take place during this operation.
The stone will be used to create around 10,000 curling stones for the World Curling Federation.
The stone is being landed at Girvan Harbour and them moved on to Kays premises in Perth.
A spokesman for the World Curling Federation said: “Kays of Scotland are undertaking all activity with an extremely high level of consideration to the environment due to the island being a Site of Special Scientific Interest.
“In addition to the environmental sensitivities, the strict levels of health and safety on site and the constantly changing weather makes it a very delicate operation.
Two types of granite are being collected from the island - Common Green which is used in the body of curling stones, and Blue Hone which is used in the running band (the part of the stone which is in contact with the ice).
This will be enough granite to create around 10,000 curling stones.
It will guarantee the production of curling stones for approximately the next 10 years.
From the mid-19th to mid-20th centuries, the island was quarried for its rare type of micro-granite with riebeckite (known as “Ailsite”) which is used to make curling stones. As of 2004, 60 to 70% of all curling stones in use were made from granite from the island.
The floor of the Chapel of the Thistle in St Giles Cathedral, Edinburgh is also made of this rock.
The island has no water, electricity, gas, sewage or telephone connections andcurrently belongs to The 8th Marquess of Ailsa. In May 2011 it was announced that the island was for sale; originally given an asking price of £2,500,000, as of March 2013, the current asking price is for offers over £1,500,000.