John Cancalosi / Kona Dolomite, (CaMg(CO3)2) from Marquette County, Michigan. Kona Dolomite is an ancient rock in which formations of fossil stromatolite (blue-green algae) occur. The stone is between 2.1 to 2.2 billi...
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John Cancalosi / Kona Dolomite, (CaMg(CO3)2) from Marquette County, Michigan. Kona Dolomite is an ancient rock in which formations of fossil stromatolite (blue-green algae) occur. The stone is between 2.1 to 2.2 billi...
