Kona Dolomite dated to over 2 billion years old. Thought to be a cyanobacteria colony (stromatolite). Found in the Kona Hills of Marquette County, Michigan. These early oxygen producers paved the way for more advanced lifeforms of the future.
These small pieces were cut from a larger piece that was sent to me. They were then hand sanded using a variety of grit papers. Finally polished with the Dremel tool.
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