fossilera:Large Polished Agatized Dinosaur Bone Section - 2.1"Beautiful cell structure on this

fossilera:Large Polished Agatized Dinosaur Bone Section - 2.1"Beautiful cell structure on this polished sauropod dinosaur bone from the Kem Kem Beds of Morocco.  It’s likely Rebbachisaurus, given it’s the only Sauropod currently described from there.  Agatized bone, sometimes referred to as “gem bone” is fossilized dinosaur bone in which the original fossil material has been replaced by silica. The impurities within the silica is what gives it the color. For example the red coloration of this bone is caused by iron based compounds. Interestingly this silica replacement often happens at a sub-cellular level leaving the internal structures intact. -- source link

More pics about