These tiny iron spheroids originate from the area around the Canyon Diablo impact crater in Arizona. The desert around the crater is littered with rusted scraps of nickel iron (meteorites) and these tiny spheroids. When the giant iron impactor slammed into the desert floor, the resulting catastrophic explosion vaporized a large portion of the meteorite. This vaporized portion condensed in the atmosphere and rained down as solidified droplets of meteoritic nickel iron. Thousands of tons of this material was scattered around the desert. Most of it is very tiny and can only be noticed after a magnet is dragged through the desert sand. Harvey Nininger famously collected a large quantity of these spheroids for his research by dragging large magnets through the desert - sometimes towed behind his car. The magnets attact a wide variety of materials, including small meteorites, spheroids, meteoritic shale (oxidized metal remains), and magnetite. This material must be sorted through and the spheroids seperated out.
In this offer you get 4-6 spheroids similar to ones shown in the photo. I have tried to remove the larger spheroids to offer here because they are more interesting and easy to see. The black centimeter cube is shown for scale and is not included. Your spheroids will come in an acrylic gemjar storage case.
If you want to sort through your own shale to seperate out spheroids, I have mixed (unsorted) spheroids and shale available elsewhere on my site. I also have rare earth magnets available.