Skip to main content
Go to accessibility notice


    Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)
    It is no surprise that minerals predominantly display colors involving one of the "earth tones" - orange, brown, black, tan, etc. Once in a while Mother Nature sticks a Joker into the deck: something so outlandishly extreme in coloration that onlookers are tempted to say -"That just can't be real!" Good examples of Cobaltoan Calcite are one of those zingers. Here a fairly normal, golden hued Calcite matrix is thinly over-coated by a second generation of Calcite strongly infused with Cobalt, a metal that the DRC is a main source for. This infusion produces a tint so exotic that it just has to be bogus. Well, it isn't. In this case the Cobalt concentration is higher than normal for this material, but still - 100% natural. The bright Cobalt based color being present only in the exterior portions of the Calcite crystals makes them appear to be outlined in hot pink. Just for a little extra 'punch' there are bright green patches of Malachite scattered about the upper surface of the piece. Other than a small bit of flaking on one side, the condition of this psychedelic confection is excellent and it measures: 4 inches by 3 inches by 2 inches (10.2 x 7.6 x 5.1 cm). There is a custom labeled base.

    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.

    Auction Info

    Auction Dates
    May, 2012
    20th Sunday
    Bids + Registered Phone Bidders: 2
    Lot Tracking Activity: N/A
    Page Views: 2,770

    Buyer's Premium per Lot:
    25% on the first $50,000 (minimum $14), plus 20% of any amount between $50,000 and $1,000,000, plus 12% of any amount over $1,000,000 per lot.

    Shipping, Taxes, Terms and Bidding
    This item cannot be shipped using standard methods. Please contact us for more information. Sales Tax information

    Important information concerning Sales Tax and Resale Certificates. Learn More

    Terms and Conditions  |  Bidding Guidelines and Bid Increments |  Glossary of Terms

    Sold for: Sign-in or Join (free & quick)
    Track Item

    Heritage membership

    Join Now - It's Free

    1. Past Auction Values (prices, photos, full descriptions, etc.)
    2. Bid online
    3. Free Collector newsletter
    4. Want List with instant e-mail notifications
    5. Reduced auction commissions when you resell your
    Consign now
    • Cash Advances
    • More Bidders
    • Trusted Experts
    • Over 200,000 Satisfied Consignors Since 1976
    Consign to the 2020 September 26 Texas Art Signature Auction - Dallas.

    Learn about consigning with us

    I was very pleased with the results and with the professionalism of Alissa and Heritage Auctions! I will definitely auction with them again.
    Phyllis R.,
    Laramie, WY
    View More Testimonials receives more traffic than any other auction house website. (Source:

    Video tutorial

    Getting the most out of search