One Off, Natural hematite polished formation, size 9cm x 9cm x 4.5cm, 532grams
One off - You get the one you see here.
These formations are called Botryoidal or Kidney Ore, the shape being similar to kidneys. This type of formation comes from quick cooled iron ore which had been bubbling and molten. The formation is completety natural forming, and the tops have been polished to present the metalic iron surface.
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