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. This piece was profiled in an earlier posting. It has now been wet sanded and polished with a Dremel tool. Has a nice reddish and pink color bands.