Skip to main content
Go to accessibility notice

    Description

    STROMATOLITE SPHERE FEATURING THE OLDEST KNOWN FOSSIL ORGANISMS
    Collenia undosa
    Precambrian (Proterozoic)
    Biwabik Formation, Mary Ellen Mine, Mesabi Range, St. Louis County, Minnesota

    Stromatolites are colonial structures formed by photosynthesizing cyanobacteria (blue-green algae) and are the oldest known fossil organisms dating back over three billion years! They were the dominant life form for over two billion years, and it is theorized that oxygen-producing cyanobacteria were responsible for the creation of the Earth's original atmosphere. These stromatolites date back over two billion years, and they are found in association with iron mines in northern Minnesota where it is now apparent that they played a key role in the formation of the Mesabi Iron Range.Mineral replacement of these colonies by red agate (Quartz) and metallic iron (Hematite) resulted in this beautiful material. Known commonly as "Mary Ellen" Jasper for the mine of the same name, this material is a rich, deep opaque red agate with tinges of black and is exceptionally beautiful when cut and polished to reveal its full potential. This elegant sphere measures 8 inches (20.32 cm). For a primitive life form, Collenia is an exquisitely beautiful fossil. Offered at no reserve.

    [Scale: 1 inch, with mark at 1 cm]


    Condition Report*: Condition report available upon request.
    *Heritage Auctions strives to provide as much information as possible but encourages in-person inspection by bidders. Statements regarding the condition of objects are only for general guidance and should not be relied upon as complete statements of fact, and do not constitute a representation, warranty or assumption of liability by Heritage. Some condition issues may not be noted in the condition report but are apparent in the provided photos which are considered part of the condition report. Please note that we do not de-frame lots estimated at $1,000 or less and may not be able to provide additional details for lots valued under $500. All lots are sold "AS IS" under the Terms & Conditions of Auction.

    Auction Info

    Auction Dates
    June, 2013
    2nd Sunday
    Bids + Registered Phone Bidders: 4
    Lot Tracking Activity: N/A
    Page Views: 1,328

    Buyer's Premium per Lot:
    25% on the first $50,000 (minimum $14), plus 20% of any amount between $50,000 and $1,000,000, plus 12% of any amount over $1,000,000 per lot.

    Shipping, Taxes, Terms and Bidding
    This item cannot be shipped using standard methods. Please contact us for more information. Sales Tax information

    Important information concerning Sales Tax and Resale Certificates. Learn More

    Terms and Conditions  |  Bidding Guidelines and Bid Increments |  Glossary of Terms

    Sold for: Sign-in or Join (free & quick)

    Heritage membership

    Join Now - It's Free

    VIEW BENEFITS
    1. Past Auction Values (prices, photos, full descriptions, etc.)
    2. Bid online
    3. Free Collector newsletter
    4. Want List with instant e-mail notifications
    5. Reduced auction commissions when you resell your
      winnings 
    Consign now
    • Cash Advances
    • More Bidders
    • Trusted Experts
    • Over 200,000 Satisfied Consignors Since 1976
    Only 7 days left to consign to the 2020 June 23 Asian Art Signature Auction - New York !

    Learn about consigning with us

    We are very glad that we selected Heritage - The whole Heritage Team was a pleasure to do business with!
    Richard Ash,
    Digby, Canada
    View More Testimonials

    HA.com receives more traffic than any other auction house website. (Source: Similarweb.com)

    Video tutorial

    Getting the most out of search