9" Knife With Fossil Dinosaur Bone (Gembone) Inlays

Knife With Fossil Dinosaur Bone (Gembone) Inlays #101813

This is a 9" long, steel knife with a handle made out of polished, purple, agatized dinosaur bone (Gembone). The bone is from the Morrison Formation in Utah and is approximately 150 million years old. The knife comes with a leather case and protective pouch.

The bone would have likely been from one of the large Sauropod dinosaurs in the Morrison Formation such as Diplodocus or Camarasaurus, as theropod bones such as Allosaurus are hollow and typically not solid enough to polish or carve.

Agatized or agate replaced dinosaur bone is a rare form of fossilized dinosaur bone where the original fossilized bone, typically permineralized with calcite, has been re-mineralized with silica-type compounds such as agate, jasper, chalcedony, or opal.

In a unique and isolated circumstance, the strata on the Colorado Plateau were uplifted during the tertiary intrusions about 35 million years ago when the San Rafael Swell and the La Sals, Henry, and Abajo Mountains were formed. As these ranges were forming, local strata layers were flooded with silica-rich, superheated groundwater. This provided the appropriate environment to start this calcite-silicate replacement in the original fossils. The most prolific layers of gem bone come from the Morrison Formation, which is late Jurassic in age.