Gem-like Collenia undosa Stromatolite from the Mary Ellen Mine
Name: Stromatolite Collenia undosa (hand polished) - also called Mary Ellen Jasper Age: Lower Proterozoic (2.2 to 2.4 billion years old) Size: (25.4mm=1 inch): 4.4 by 2.4 inches Location: Biwabik Formation, Mary Ellen Mine, Mesabi Range, St. Louis County, Minnesota Code: DS706 Price: $25.00 - Sold |
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