Skip to main content
Go to accessibility notice

    Description

    PRECIOUS GEM AMMONITE
    Placenticeras meeki
    Cretaceous
    Bearpaw Formation, Southern Alberta, Canada

    A fine example of these highly sought-after specimens, this extremely bright and colorful ammonite flashes predominantly with fiery red on one side, whilst the other side is mostly a gorgeous golden green. This iridescent material is known as ammolite, one of the world's rarest precious stones and the result of millions of years of compression and the mineralization of iron, copper and silica precipitated from volcanic ash. The shimmering and ever-changing colors are caused by light refracting through and rebounding from thin platelets of aragonite, the primary constituent of the ammonite's nacreous shell lining. As with most specimens from the area, this one is significantly compressed, but retains good areas of three-dimensionality and is of good size, 17 3/8 inches in diameter.


    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
    June, 2010
    6th Sunday
    Bids + Registered Phone Bidders: 3
    Lot Tracking Activity: N/A
    Page Views: 3,001

    Buyer's Premium per Lot:
    19.5% of the successful bid (minimum $14) 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)

    Heritage membership

    Join Now - It's Free

    VIEW BENEFITS
    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
      winnings 
    Consign now
    • Cash Advances
    • More Bidders
    • Trusted Experts
    • Over 200,000 Satisfied Consignors Since 1976
    Only 7 days left to consign to the 2020 June 25 Asian Art Signature Auction - New York !

    Learn about consigning with us

    Thank you for all that you did to make the auction sale of my silver and art glass consignment a tremendous success.
    H. W. ,
    Memphis, TN
    View More Testimonials

    HA.com receives more traffic than any other auction house website. (Source: Similarweb.com)

    Video tutorial

    Getting the most out of search