References

1. C. A. Sawicki, "Small inexpensive diamagnetic levitation apparatus," Phys. Teach. 39, 556–558 (Dec. 2001). first citation in article
   
2. Available at large hardware stores; or, look in the telephone directory under "Plastics-Rods, Tubes, Sheets, Etc." The more commonly available round tubing will provide an adequate, but not quite as good, effect. first citation in article
   
3. Pieces of pyrolytic graphite are carried by Scitoys at http://scitoys.com, three pieces for $6. first citation in article
   
4. Scitoys also carries 2-mm NdFeB magnets, 50 cents each, see Ref. 3. first citation in article
   
5. Large ceramic magnets are widely available. We use 3 × 3 × 1/2 in thick (Catalog #CB-802, $6 each) from The Magnet Source, 607 S. Gilbert St., Castle Rock, CO 80104; 888-293-9399, http://www.magnetsource.com. first citation in article
   
6. NdFeB magnets are widely available. We obtained ours from Scitoys, $4.50 each (see Ref. 3). Another source is Force Field, 2606 W. Vine Dr., Fort Collins, CO 80521; 877-944-6247, http://www.wondermagnet.com. first citation in article