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    Description

    SUPERB IRIDESCENT AMMONITE
    Discoscaphites conradi
    Late Cretaceous
    Fox Hills Formation
    Cheyenne River, South Dakota

    All ammonites boasted a shell lined with nacre, or mother-of-pearl; in most instances it is transformed by the fossilization process into calcite, but in a very few localities worldwide is it preserved unchanged, retaining a lovely fiery sheen. This is a superb example of an American scaphite, with excellent nacre coverage to the ridged, horned shell. As well as the rarity of its form of preservation, the scaphite is a scarce late-form ammonite so-named from the Greek "scooped out" for the gradual "unwinding" of the ammonite's familiar coiled shape; the scaphites would later develop into an almost completely unfurled heteromorph. A gorgeous little example displaying fine iridescent colors of green, pink and red; the ammonite sits on the original matrix and stands 3.5 inches (8.89 cm) high.


    [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: 2
    Lot Tracking Activity: N/A
    Page Views: 1,253

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