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    Description

    QUARTZ with ARSENOPYRITE, CHALCOPYRITE & SPHALERITE INCLUSIONS
    Mina da Panasqueira, Couto Mineiro da Panasqueira, Panasqueira, Covilhã, Distrito de Castelo Branco, Portugal

    The Mines of Panasqueira have been quite prolific over the years, but virtually all of the specimens from there are minerals related to the ores. This is one of the few that exhibits ore minerals in a supporting role. The Quartz crystal comprising the lot is notable for several reasons: First, it is extremely large for Panasqueira and transparent to boot; Second, it is a unique example of a "phantom" crystal - one that visibly contains other minerals that deposited upon a exterior surface of the growing crystal before it finished its growth. As a result, those other minerals (in this case: Arsenopyrite, Chalcopyrite and Sphalerite) are trapped within the Quartz crystal like bugs in Amber. The reason that the "phantom" crystals only appear on one side of the Quartz is that the Quartz was attached to the wall of a fissure and the side with the other minerals was the 'up' side that served to catch a gentle 'snow-fall' of the other minerals while it was still growing. It is reportedly from a European collection and probably dates back several decades at minimum.
    Overall Measurements: 8.5 x 3.12 inches (22 x 8 cm). Offered at no reserve.

    Provenance: Keith Proctor Collection [Hoppel Catalog # D0379]


    [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.

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    Auction Dates
    June, 2013
    2nd Sunday
    Bids + Registered Phone Bidders: 1
    Lot Tracking Activity: N/A
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