Skip to main content
Go to accessibility notice
For Art and Antique Auctions, standard shipments are being delayed 2-4 weeks due to increased safety procedures and vendor and carrier slowdowns. As soon as your order ships, you will receive a tracking number.


    Araucarioxylon arizonicum
    Chinle Formation, Winslow, Arizona
    This superb slice perfectly epitomizes why specimens from the world-famous Petrified Forest locality in eastern Arizona are known as "Rainbow Wood". The surface swirls with incredible clouds of black, red, orange, green, mauve and brown, in an astounding pattern created over millions of years of mineral replacement. An ancient conifer tree, whose nearest living relative is the Norfolk Island Pine, this species dates back to over 200 million years ago when Arizona was situated south of the equator as part of the Pangea supercontinent. Out on the plains, stream banks were constantly being undermined by the surging river waters, and toppling these giant trees into the floodwaters. Cataclysmic volcanic activity buried tropical conifer pines and other hardwoods under massive layers of ash, entombing the wood and securing their place in natural history. As silica-bearing ground-water seeped into the fibers of the buried trees, organic material was replaced cell by cell whilst still preserving its fundamental structure, often right down to the microscopic level. Nowadays these logs must be unearthed from layers of bentonite clay, as material which has lain on the surface for any longer amounts of time is damaged due to weathering. This is a particularly large, thick and beautiful example, one face brought to a lustrous, high-polished finish, and retaining excellent texture to the surrounding bark which is rarely preserved. An outstanding example of an uncommonly large size, measuring 43 x 30½ x 1 5/8 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. 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
    May, 2012
    20th Sunday
    Bids + Registered Phone Bidders: 2
    Lot Tracking Activity: N/A
    Page Views: 1,499

    Buyer's Premium per Lot:
    25% on the first $50,000 (minimum $14), plus 20% of any amount between $50,000 and $1,000,000, plus 12% of any amount over $1,000,000 per lot.

    Shipping, Taxes, Terms and Bidding
    This item cannot be shipped using standard methods. Please contact us for more information. Sales Tax information

    Important information concerning Sales Tax and Resale Certificates. Learn More

    Terms and Conditions  |  Bidding Guidelines and Bid Increments |  Glossary of Terms

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

    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
    Only 39 days left to consign to the 2021 March 16 Asian Art Signature Auction - New York !

    Learn about consigning with us

    I have to say I am very pleased with the final results and Heritage Auctions service.
    Philip M.,
    Truckee, CA
    View More Testimonials receives more traffic than any other auction house website. (Source:

    Video tutorial

    Getting the most out of search