Small aval water-worn pebble to protect cattle from disease
1800-1920
Black siliceous pebbles suitable for gold assaying as touchstones
Unknown
Black siliceous pebbles suitable for assaying use as touchstones, 1995
1995
Siliceous pebbles suitable for assaying gold, Turkey
1978-1995
Circular flint pebble
1880-1920
Rounded flint pebble with water worn hole
1880-1920
Black siliceous pebbles suitable for use as touchstones for assaying purposes, Kuwait, 1978-1995
1978-1995
Oval disc-shaped pebble
1880-1920
Pebble amulet
1870-1932
Pebble amulet
1880-1930