Mr. J.R. Hooper of North Carolina has been making miniature marbles for about six years now. His technique is a trade secret but the amazing thing is that he really makes each tiny marble by hand. He is teaching his children this tiny craft so they will continue the tradition.
I am truly delighted to finally have them in my collection. Mr. Hooper occasionally makes marbles of regular size but increasing demand for the miniatures has kept him quite busy. I recommend you try to nab some yourself from eBay before the price skyrockets from demand. I lost three auctions before I finally won these babies.
Yes, that is a dime behind them. And yes, they really are that small and detailed!
Update: If you want to try to buy some of these his eBay seller id is jesnbec73