Dinosaur bone is also known as agatized dinosaur bone, which is a more accurate description of what it is.
The vast majority comes from Utah and Colorado.
Agatized dinosaur bone forms as natural minerals carried in groundwater replace the original cellular structure in the bones of fallen dinosaurs.
Agate, hematite, iron, pyrite, jasper and quartz are some of the most common minerals that can crystallise.
Dinosaur bone forms in a similar way to petrified wood.
