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    Description

    MARRA MAMBA TIGER EYE SLAB
    Mt Brockman Station, Western Australia
    About 2000 million years ago the Western Australian Pilbara and many of the other very old pieces of the continental crust were joined together in one supercontinent. When this supercontinent started to break up, waters heated by volcanic activity dissolved much of the silica from the Banded Iron Formation units leaving huge iron ore deposits of almost pure hematite (more than 65% iron). In other places, red and yellow iron oxides and/or silica were deposited as veins or replaced the wall areas of fine cracks in the host rock. In one small area of Western Australia, the resulting stone is unique, and known as Marra Mamba. In a red jasperlite host rock banded with hematite and splashes of iron pyrite, it is the most beautiful and highly sought-after variety of tiger eye there is. The source is now mined out and only rare specimens make their way onto the market, very few of a quality comparable to the lots offered here. This example displays the typical bands of golden tiger's eye, shimmering silver-black hematite, striking red jasper and the oldest of all fossils, algae-derived stromatolite. The gentle curves and waves of the layers bear witness to the immense pressures to which the rock is inexorably subjected over an almost unimaginable amount of time. This beautiful and highly polished slab is an excellent example of this rare and lovely mineral and measures 24½ x 14¼ x 3/8 inches.


    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, 2009
    17th Sunday
    Bids + Registered Phone Bidders: 6
    Lot Tracking Activity: N/A
    Page Views: 3,128

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

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