I've just gotten in a big new batch of old clay marbles, which I can never get enough of, and which I thought would also be handy to have in stock as I keep acquiring old marbles solitaire boards, too. These are exactly the sort I like--very earthy, with lots of color variation but pretty subtle and very stone like. I've divided them up into groups--what you see is exactly what you'll get.
These average about 1/2" in diameter, some a little bigger, some a little smaller. I've tried to weed out any with much damage, but certainly there are a few little chips here and there.