MED RATTLER EGGS Herpetological Ova. Rattlesnake eggs. Or "hematite magnets" to the novelty community, who claim no use for them beyond playfully holding them apart in your hand and tossing them in the air to listen to the strange, but enchanting, brrraaaaaapppping sound they make when they mate. The sound, of course, varies with the size of the orbs, so if you get all three you&#39;ve got the makings of a rattlesnake orchestra. Plus the small ones make cute magnetic earrings. (The bigger ones are a little painful.) Sizes small through large are 5/8" dia, 3/4", and 1" dia. Keep all of them away from pacemakers, cell phones, PCs and credit cards. They are magnets, after all. Click on the accessories link to see other items mentioned in this description.