Rib Bone Gembone (Dinosaur Bone) - $590

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A Gembone rib (or dinosaur Gembone rib) is a fossilized dinosaur rib bone that has undergone agatization—a process where the original organic and calcium-based material of the bone is completely replaced by minerals like quartz, agate, or chalcedony over roughly 150 million years.

(Private collection, old stock collected on private land from the Colorado Plateau)

The Colorado Plateau is a vast, high-desert physiographic region in the Southwestern United States, roughly centered on the Four Corners. Spanning roughly 130,000 square miles (337,000 square kilometers) across southeastern Utah, northern Arizona, northwestern New Mexico, and western Colorado, it is famous for its exposed, multicolored sedimentary rock layers and deep river canyons.

You may also come to the shop and see it in person in Las Vegas.
Rockhounding Nation
Las Vegas, NV

post id: 7999206018

posted: 2026-11-11 16:47

updated: 2026-11-11 16:49

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Rib Bone Gembone (Dinosaur Bone) - collectibles - by owner - sale -...

A Gembone rib (or dinosaur Gembone rib) is a fossilized dinosaur rib bone that has undergone agatization—a process where the original organic and calcium-based material of the bone is completely...