Donegal, Omagh and blue centred sandstoneDonegal, Omagh and blue centred sandstoneSandstone window cillsDonegal, Omagh and blue centred sandstoneGarage door arches built on keystone lntelsDonegal, Omagh and blue centred sandstoneGarage door arches built on keystone lintelSandstone window cillsSandstone double layered pier cap