Kilkenny_marble
Kilkenny marble or Kilkenny black marble is a fine-grained very dark grey carboniferous limestone found around County Kilkenny in Ireland in the "Butlersgrove Formation", a Lower Carboniferous limestone that contains fossils of brachiopods, gastropods, crinoids and corals.[1] The first and main source was the "Black Quarry" in the townlands of Archersgrove and Gallowshill just south of Kilkenny city,[2] which was used from the 17th to the 19th century. Kilkenny is nicknamed "the Marble City"; the footpaths of the city streets were paved with Kilkenny marble flagstones, which were highly polished with wear and glistened when wet.