Triangular fragment of radiolarian chert, possibly rudely chipped, from Marchhouse, Muirkirk, East Ayrshire

Fragment of grey chert or flint, from Mound No.1, Knap Knowes, Quandale, Rousay, Orkney

Fragment of grey chert or flint, from Mound No.1, Knap Knowes, Quandale, Rousay, Orkney

Fragment of blue-grey chert, from Kirkburn, Lockerbie, Dumfries and Galloway

Fragment or fragments of chert, from a ring-cairn at Rullion Green, Glencorse, Midlothian

Two flakes of flint and two fragments of chert, from a ring-cairn at Rullion Green, Glencorse, Midlothian