Mimetite var. Campylite
    Blea Gill, Caldbeck Fells
    North and Western Region (Cumberland)
    Cumbria, England
    United Kingdom

    Mimetite is a not uncommon Lead Arsenate mineral known from many mining districts worldwide. Campylite is a variety of Mimetite that is distinguished by the curved faces of the Mimetite. These curved or barrel shaped Mimetites are known from ten or less localities around the globe. In some cases, the curved nature of the crystals results in groups taking on a spherical shape as is seen in this specimen. Color varies with changes in accessory Chlorine and Phosphorous content, shifting from red to yellow and finally to green. Here, a mix of those colors, and in some cases the shift in coloration, extends from the core of the crystals outward. This specimen is quite old judging from one of the two labels accompanying it. There are a several bruised spots on the specimen - a not unusual circumstance with old specimens when less care was taken collecting. Nevertheless, specimens of this size and origin are still quite highly prized. The piece is accompanied by one old collection label, and one in a more recent style from the University of Chicago. The backside of the specimen has two collection numbers affixed to it: "2222" and "2194".
    Overall measurements: 4 x 3 x 1.5 inches (10.2 x 7.6 x 3.8 cm)
    Offered at no reserve.

    Provenance: Western Minerals, ex. University of Chicago Department of Geological Sciences [Hoppel #D1159]

    [Scale: 1 inch, with mark at 1 cm]

    Estimate: $2,000 - $3,000.

    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. 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.

    Fees, Shipping, and Handling Description: Miscellaneous Collectibles, Large (view shipping information)

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    Auction Info

    Auction Dates
    June, 2016
    2nd Thursday
    Bids + Registered Phone Bidders: 0
    Lot Tracking Activity: N/A
    Page Views: 424

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