Name: Stromatolite Collenia undosa (polished) - also called Mary Ellen Jasper - an opaque red agate Age: Precambrian (2.2 to 2.4 billion years old) Size (25.4mm=1 inch): 5.6 by 2.2 inches maximum Location: Biwabik Formation, Mary Ellen Mine, Mesabi Range, St. Louis County, Minnesota Code: DS715 Price: $22.00 - Sold |
Stone
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