Tsumeb, Otjikoto Region, Namibia
    Dioptase: a copper silicate mineral that is rarely encountered in spite of the fact that there are copper mines on every continent except Antarctica (no mining allowed). This is a tragedy since dioptase is one of the minerals most often cited as the most beautiful, particularly by non-collectors. A second tragedy is that the blue-green color of dioptase, like emerald, is virtually impossible to photograph accurately: It always looks better in real life. "Blue-green" doesn't begin to describe the color. In the past, Africa has produced the lion's share of fine dioptase specimens, with Russia a distant second. Of the African localities, the Tsumeb Mine in the north-central part of Namibia has been the most prolific source for this most collectable species. Tragedy Number Three: The Tsumeb Mine closed several years ago and is not likely to re-open. There are a number of variations possible in dioptase from Tsumeb. One of the most sought after is the type seen here, where the dioptase is sparingly distributed along the edges of sharp, white calcite crystals. This 'outlining' enhances the sense of depth of the specimen, while the rich color invites the eye to: linger awhile. The reverse side of the specimen is thickly encrusted with a druze of tiny, sparkling dioptase crystals up to ΒΌ inch in size. Scattered olive-green duftite micro-crystals also serve to enhance the overall effect. This wonderful jewel stands 3 1/2" high. It is 3 1/4" wide and approximately 1 3/4" thick. It is mounted on a custom RTV base. A true classic from one of the World's premier localities.

    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: Requires 3rd Party Shipping (view shipping information)

    Sales Tax information  |  Terms and Conditions

    Bidding Guidelines and Bid Increments

    Glossary of Terms

    Auction Info

    Auction Dates
    January, 2008
    20th Sunday
    Bids + Registered Phone Bidders: 0
    Lot Tracking Activity: N/A
    Page Views: 716

    Buyer's Premium per Lot:
    19.5% of the successful bid (minimum $9) per lot.

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

    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 2018 May 5 Texas Art - Dallas.

    Learn about consigning with us

    From the preview party to the last lot to go under the hammer, everything was done in a remarkably professional manner.
    Richard de Thuin,
    Waldoboro, ME
    View More Testimonials receives more traffic than any other auction house website. (Source:

    Video tutorial

    Getting the most out of search

    Recent auctions

    2017 October 13 Illustration Art Signature Auction - Dallas
    2017 October 13 Illustration Art Signature Auction - Dallas
    REALIZED $1,098,328