Dinosaur bone

About it

Spongy inner bone shows a honeycomb of cells in cross-section, often filled with agate or iron minerals. Vertebrates on US federal land need a permit, and some bone from the uranium country of the Colorado Plateau is mildly radioactive.

Type

Fossil (vertebrate)

Group

Dinosaur (reptile)

Colours

brown, black, grey, red, tan

Transparency

opaque

Periods

Triassic, Jurassic, Cretaceous

Typical values: real specimens vary. For more, see mindat.org.