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    Dongchuan Cu ore field, Dongchuan District
    Kunming, Yunnan

    This rather unusual concretion clearly resembles a "spaceship" and consists of hardened sediment, with a sprinkling of Pyrite that encircles the extreme natural shape. This variety of concretion forms inside of sediments prior to hardening into rocks when still soft as the material starts to compact and loses water. Often beginning by nucleating around a fossil or a fragment of some organic material, black shale forms indicative of conditions of little or no oxygen but abundant Sulfur. Iron in the system would be drawn to the Sulfur and form Pyrite in concentric layers resulting in round, or elliptical, concretions of black shale. Such formations are few and far between with this representation being one of the biggest and best and was likely mined about five years ago. Presented on a custom engraved acrylic base, this monstrous and surreal specimen is sure to be a conversation starter in any display case or collection where it is housed.
    Measurements: 11.02 x 10.63 x 4.72 inches (28.00 x 27.00 x 12.00 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. Heritage does not guarantee the condition of frames and shall not be liable for any damage/scratches to frames, glass/acrylic coverings, original boxes, display accessories, or art that has slipped in frames. All lots are sold "AS IS" under the Terms & Conditions of Auction.

    Auction Info

    Auction Dates
    September, 2021
    2nd Thursday
    Bids + Registered Phone Bidders: 1
    Lot Tracking Activity: N/A
    Page Views: 805

    Buyer's Premium per Lot:
    25% on the first $300,000 (minimum $49), plus 20% of any amount between $300,000 and $3,000,000, plus 12.5% of any amount over $3,000,000 per lot.

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