spherical

Dug this up while excavating an area in central Missouri. It was in an area with lots of clay if that matters much. Top Angles: Bottom:

Thanks in advance for any input and opinion on what this may be. I found this while landscaping laying mulch, as we were emptying a trailer load of it into wheelbarrows. I heard a "ding" on my shovel and immediately investigated only to find this oddly intriguing stone. ~7cm^3 volume : 54g...

Found this doing mulch, thought it might have been slag metal that went through a chipper but a sample prepper told me no way. It's iron. Hoping it's iron nickle. Lmk what you speculate. 54 grams 7 cm^3

Before I knocked the dirt off this little brass piece, I had hope that it could possibly be a finial from a union cartridge box. After cleaning and digging some of the rust out of the gap, I see no evidence of leather. Does anyone recognize this piece? Or possibly provide suggestions what...