The name literally means the ‘hole stone’ and along with two upright granite stones either side appears to form a three dimensional lol. The circular stone is in the shape of a torus. This is the shape of a human embryo in its early stages and the shape many scientists use to model the universe.
The stones were known for their healing properties and fertility.
On a full moon if a woman passes through the stone 7 times backwards she increases her chances of becoming pregnant
Likewise if a child with rickets passed through naked 9 times he will be cured.
The circular stone aligns exactly with the centre stone at Boscawen-Un and the church at nearby St Buryan. While this may conceivably be coincidental, the precision of the alignment suggests an intentional positioning of the structures in relation to each other.