Description

    LARGE ZEBRA ROCK SPHERE: A MYSTERY STONE
    Johnny Cake Shale Formation, East Kimberly, Western Australia

    The distinct reddish-brown and white colored sphere is made from banded stone known as "Zebra" rock. This distinct material is only found in the Johnny Cake Shale formation of Western Australia. The rock is an "argillite" or clay-based rock: chiefly composed of clay minerals, but also containing tiny angular fragments of quartz and mica flakes. The reddish-brown coloration is attributed to Iron Oxide, but, to date, there has not been a definitive explanation as to how the various patterns of stripes and dots occurred - it is still a mystery! This large sphere measures 21.5 inches (54.61 cm) in circumference and displays various aspects of patterning, culminating in a "bull's-eye" effect. This sphere has been polished to a bright porcelain finish and is in excellent condition.
    Overall Measurements: 6.8 inches (17.27 cm) in diameter.
    Offered at no reserve.


    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
    September, 2014
    28th Sunday
    Bids + Registered Phone Bidders: 1
    Lot Tracking Activity: N/A
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