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    Description

    GEMSTONE AMMONITE
    Placenticeras meeki
    Upper Cretaceous
    Bearpaw Formation, Alberta, Canada

    The ammonites found in this small area of North America 65.5-100 million years ago have become some of the most sought-after of all fossils for their remarkable transformation into the biogenic gemstone Ammolite. All ammonites have a layer of mother-of-pearl on their shells, but only in the Placenticeras sp. of this region has it been transformed into this wonderful, brightly colored material. Millions of years of compression and the action of bentonite sediment have transformed the nacre into ammolite, characterized by bright opalescence and fiery coloring. The present example flashes all over one side with a rich red color while the other side displays predominantly a vivid electric green, fringed with gold and blue and even shows some of the rare purple coloring. The shell texture displays the egg-like crackling characteristic of these specimens and retains a decent three-dimensionality, making for a fine and aesthetic collector's specimen, approximately 9 inches in diameter, on a wooden display stand.


    Estimate: $11,000 - $13,000.

    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.

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    Auction Info

    Auction Dates
    June, 2011
    12th Sunday
    Bids + Registered Phone Bidders: 0
    Lot Tracking Activity: N/A
    Page Views: 694

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