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    Description

    Quartz Stalactites
    Lake Otjikoto, Tsumeb, Otjikoto Region, Namibia

    Many are the stalactites of the world, but not many are made of Quartz: Calcite seems to be much more common. There is a good reason for this; Calcite can be deposited at normal surface temperatures and pressures. For Quartz to deposit takes much higher temperatures and pressures; the kind of conditions normally found much deeper underground. Regarding the alleged locality of Lake Otjikoto. This is somewhat suspicious since the lake is part of a limestone cave system - not your first choice for Quartz of any sort. It is far more probable that the specimen came from a locality nearby, where conditions would be more conducive to its formation. In any event, the specimen is a sizable group of Quartz stalactites arranged in a parallel configuration. The white color is shaded in places by a small amount of Iron, or Manganese Oxide, coatings between the sparkling, stubby Quartz crystals that cover the original surfaces of the piece. There are signs of the group's attachment on the sides and back/bottom, otherwise this large cabinet specimen is in excellent condition.
    Measurements: 11.0 x 8.9 x 6.2 inches (28.0 x 22.5 x 15.7 cm)
    Offered at no reserve.

    Provenance:
    Rainbow of Africa Collection


    Estimate: $2,500 - $3,500.

    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.

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    Auction Info

    Auction Dates
    October, 2015
    15th Thursday
    Bids + Registered Phone Bidders: 0
    Lot Tracking Activity: N/A
    Page Views: 827

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