Pebble hammer, abraded at ends, with perforation tapered to middle, from Thornidike Park, Spottiswoode, Berwickshire

Pebble hammer with perforation countersunk from both sides, from near Coldingham, Berwickshire

Pebble hammer with perforation countersunk from both sides, from Muircleuch, Berwickshire

Pebble, from The Wolds, Yorkshire, England

Pebble, from The Wolds, Yorkshire, England

Pebble of quartz, from ledge on the side of Carn Ban chambered cairn, Achnacree, Argyll and Bute

Pebble of quartz, from ledge on the side of Carn Ban chambered cairn, Achnacree, Argyll and Bute

Pebble of quartz, from ledge on the side of Carn Ban chambered cairn, Achnacree, Argyll and Bute

Pebble of quartz, from ledge on the side of Carn Ban chambered cairn, Achnacree, Argyll and Bute

Pebble of quartz, from ledge on the side of Carn Ban chambered cairn, Achnacree, Argyll and Bute

Pebble of quartz, from ledge on the side of Carn Ban chambered cairn, Achnacree, Argyll and Bute

Split pebble of white quartz, from Chamber 1, Glecknabae chambered cairn, Bute, Argyll and Bute

Pebble of quartzite, from a cemetery near Cairnconan, Angus

Pebble of quartzite, from a cemetery near Cairnconan, Angus

Pebble of quartzite, from a cemetery near Cairnconan, Angus

Pebble of quartzite, from a cemetery near Cairnconan, Angus