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    Cerussite on Pyrolusite (?)
    Campbell Shaft, Bisbee, Warren District, Mule Mts, Cochise Co., Arizona, USA

    "A few small pseudo hexagonal light tan cerussite crystals growing on botryoidal black pyrolusite? I bought this specimen from John Sinkankas. It is pictured in his book Mineralogy for Amateurs."
    - Rock H. Currier

    Cerussite was only encountered in crystals in a few places in the Bisbee mines, chiefly in the 155 Stope, off of the Campbell Shaft, on the 1800' level. All known specimens show the same 'pseudo-hexagonal' form and all tend to be found on a black, botryoidal matrix of undetermined composition, probably a mixed Iron Manganese Oxide mineral. Pyrolusite is a likely candidate but Manganese oxides are notorious for changing structure and character in the X-ray beam used to identify them, and therefore Pyrolusite is only a 'best guess.' It doesn't hurt that this specimen was owned, and pictured, by noted collector and author: John Sinkankas.
    Overall Measurements: 2.2 x 1.4 x 1.2 inches (5.5 x 3.5 x 3.0 cm)
    Offered at no reserve

    Provenance: Ex. John Sinkankas Collection [RHC #851, acquired 1967]
    Publication: Sinkankas, John. Mineralogy for Amateurs. New York: Van Nostrand Reinhold, 1964. Chapter 9, p. 376, Fig. 188.

    [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. 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
    August, 2019
    26th Monday
    Bids + Registered Phone Bidders: 16
    Lot Tracking Activity: N/A
    Page Views: 897

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