This is the preview post #10 for the 2026 ESCONI Gem, Mineral, and Fossil Show Live Auction.  The ESCONI Gem, Mineral, and Fossil Show for 2026 will be held on March 21th and 22nd at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year.   All details can be found here.

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For today’s preview, we have a nice Merycoidodon (Oreodon) Jaw from the Brule Formation near Chadron, Nebraska. The Brule Formation dates to the Oligocene about 34 and 30 million years ago. This jaw is in nice shape with six complete teeth.