Rattlesnake Egg Magnets Or singing suppositories. The pair is very magnetic, whatever they are. The 1-3/4" long prolate spheroids look like highly polished black hematites. Hold them an inch apart in your palm, toss 'em into the air and listen to them make a sound like the cyber-crickets. Or an electrocuted chicken. The manufacturer suggests keeping these mega-magnets away from computers, pacemakers, TV sets and credit cards.