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    Cyanotrichite & Brochantite
    Grand View Mine, Horseshoe Mesa, Grand Canyon, Coconino Co., Arizona, USA

    "A shallow vug in a "limonite matrix" lined with dark green micro brochantite crystals with some tufts of blue cyanotrichite growing on it. The specimen was collected by Bob Bartsch. I got the specimen when I was willed his mineral collection after his death. The suite of specimens that he collected at that time is I am sure the finest group of specimens remaining from the mine, and possibly the finest ever from this small mine. The specimen should be kept in a dust free container and not put on display. The scale under the specimen is an inch with a rule at one cm."
    - Rock H. Currier

    Arguably the Grand View Mine is the source of the best-looking Cyanotrichite specimens ever found. Unfortunately, the mine is now on public lands where collecting is verboten. Seems like any locality on public lands capable of producing anything other than mud, sand or gravel, has a ranger parked on it, dedicated to checking your: car, backpack, or pockets, for evidence of 'conspiracy to collect'. Quite a shame: Cyanotrichite is a very beautiful mineral and there is very little of it available ... but there is this one - one that Bob Bartsch so skillfully collected many, many, years ago.
    Overall Measurements: 3.0 x 2.8 x 1.2 inches (7.5 x 7.0 x 3.0 cm)
    Offered at no reserve

    Provenance: Ex. Robert Bartsch Collection [RHC #9165, acquired March 2015]
    MinID 01G-LX2

    [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: 8
    Lot Tracking Activity: N/A
    Page Views: 2,049

    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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