Small slab of sandstone, with three small pits enclosed by an incised oblong figure, from Sandwick, Orkney

Grey slab of sandstone with six concentric circles (rings) and a cup mark pecked on one face, from Cairnholy chambered cairn No.1, Kirkmabreck, Dumfries and Galloway

Sandstone block with small natural hollows and a cup mark at its centre, from a stone circle at Cairnpapple, West Lothian

Sandstone block with three cup marks in one face, from a stone circle at Cairnpapple, West Lothian

Slab of red sandstone with eighteen cup marks on one side, from a stone circle at Balbirnie, Fife

Slab of red sandstone decorated with eight cup marks, a large cup with a ring and a cup with a faint ring, from a stone circle at Balbirnie, Fife

Stone with one ring mark and one double ring mark with a gutter coming from the inner ring, from The Tappoch Broch, Torwood, Stirling

Stone with four cup and ring marks, some with multiple rings, from The Tappoch Broch, Torwood, Stirling

Stone with a ring mark with three rings and a cupmark with three rings, from The Tappoch Broch, Torwood, Stirling

Rectangular slab of flagstone with a longitudinal pattern on one face, from Skara Brae, Orkney, 3100 - 2500 BC

Neolithic stone decorated with two rings, reused as an end of grave marker, from Nether Largie North, Kilmartin, Argyll

Cast of a stone with pecked lines, once considered as a possible boat carving, from Ri Cruin, Argyll

Block of granite with cup-markings on each of its two sides, Skene, Aberdeenshire

Cast of cup and ring markings on a rock at High Banks, Kirkcudbrightshire

Cast of cup and ring markings on a rock at High Banks, Kirkcudbrightshire

Cast of cup and ring markings on a rock at High Banks, Kirkcudbrightshire