A small jar full of these non descript clays will go for $80 on Ebay as a decorative item. Non collectors eat them up for a display.
The Benningtons are just a cool marble. They will go from under 1/2" to over an inch in diameter. They are fun to hold and handle and come in a variety of colors--sometimes three or more colors. The eyes are from the kiln “cooking” process where they were sitting against each other during the firing, the glaze that was applied just stuck to the one it was sitting next to.
Who does not love a” bennie”?
Marble—On!!