To be perfectly honest, for me it was mostly a pretext to have an evening on the west side of the island and to photograph some evening scenes. Kirill, who was there on the first night, brought back some pictures of some polygonal patterns visible on the stony part of the shore in low tide, less spectacular than ones at Giant's Causeway, but present.
There is indeed a pattern, more obvious in some places, less in others, and where the surface is more eroded, lines of lighter-colored stones are visible between the polygons.