Copper
Rome, Malheur County, Oregon, USA
Flattened, hackly mass of native copper, might have a few crude crystals.
It is highly likely this is manmade smelter or splash copper, given the bubbly surface on one side and flat presentation on the other. There is a little rock material embedded in the backside, but this could just be a result of material sticking from the ground. It is ...
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