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    Very Fine Gemstone: Tanzanite - 35.66 Ct.
    Block C, Merelani Hills, Lelatema Mts, Simanjiro District, Manyara Region, Tanzania

    By now the story of Tanzanite has trickled down to street level courtesy of umpteen "infomercials" and lots of cruise ship hucksterism. Which isn't to say that Tanzanite isn't a worthy gem material; it's a great gem material. Nothing on Earth combines the blue of Sapphire with flashes of Amethystine purple - Nothing. To get the full effect of this unique color combo you need to "super-size" it. Fact: Larger Tanzanites show these color effects to a greater degree than small ones. The proof of that assertion can be seen in this rather sizable mixed-cut cushion that very clearly displays a purple/violet inflected Sapphire blue color, particularly noticeable when moving the stone back and forth. This coolly colorful gem was cut in Arusha, Tanzania, from rough found in 1965: that is fairly early in Tanzanite's trajectory as a gemstone. As noted in the AGL Cert that accompanies the stone (# CS 65962), it is commonly understood that Tanzanite is heat-treated to improve color. It is not stated whether this particular stone has had such treatment, but if one looks at this gem it definitely has flashes of red. Red flashes are used as an indicator that the stone has not been heat-treated. The GIA states that in "some exceptional Tanzanites, the color is predominately an intense violetish blue with red flashes of pleochroic color coming from within the stone." That certainly is the definition of this stone: it is exceptional.
    Measurements: 18.91 x 18.28 x 13.42 mm, 35.66 cts.
    Offered at no reserve.

    Provenance: Rainbow of Africa Collection
    Accompanied by AGL Certificate # CS 65962

    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
    October, 2015
    15th Thursday
    Bids + Registered Phone Bidders: 12
    Lot Tracking Activity: N/A
    Page Views: 2,897

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