The reddish stain on the bottom might suggest iron, but this is manganese found near Socorro, NM. The piece was just yards away from a mine that was marked as a manganese mine, closed for the national reserve. Specimens of relatively pure metal that appear on the surface were called "floats by the old prospectors. By the way, the spot price as of 6-24-22 is .99 for 9 ounces, making this about .50 worth of manganese as a commodity. After postage and fees, I hope to pocket about .00.