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    Description

    GEM AMMONITE IN MATRIX
    Placenticeras meeki
    Late Cretaceous
    Bearpaw Formation, southern Alberta, Canada

    A dazzling example of these highly sought-after specimens, this extremely bright, colorful Ammonite retains a full covering of the biogenic gemstone Ammolite, flashing with fiery red, orange and green iridescence, and even a couple of small patches of the rare purple coloring. At 9¾ inches in diameter, it is exposed on one side from the 22¼ x 16 inch dark-gray shale matrix, a perfect background to highlight the dramatic aesthetic contrast of the fossil. Over 90% of Ammolite is found only in this locality in southern Alberta. The phenomenal colors were naturally created through the combination of millions of years of compression, and the mineralization of Iron, Copper and Silica which precipitated from volcanic ash. Unlike other gemstones, whose brilliance is caused by light reflected from the surface, the shimmering and ever-changing colors of Ammolite are the result of light refracting through and rebounding from thin platelets of Aragonite, the primary constituent of the Ammonite's shell. A highly aesthetic specimen, it is presented on a custom metal display stand.


    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
    May, 2012
    20th Sunday
    Bids + Registered Phone Bidders: 1
    Lot Tracking Activity: N/A
    Page Views: 1,066

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