07534 - Beautiful Pyritized 0.49 Inch Olcostephanus sp Lower Cretaceous Ammonites KemKem_Beds_Fish_Assemblage and/or fused soil

and/or fused soil

It is one of the main industrial ores of the metal vanadium and a minor source of lead

Richterarges

The opaque minerals represent the 17 % of the sample composed mostly of iron

Trimerocephalus

07534 - Beautiful Pyritized 0.49 Inch Olcostephanus sp Lower Cretaceous Ammonites KemKem_Beds_Fish_Assemblage and/or fused soilOlcostephanus sp, Neumayr (1875) Ammonite Cephalopoda Ammonoidea Olcostephanidae It is naturally pyritized. It has undergone a taphonomic process of permineralization in Iron Sulfide (Pyrite). Permineralization is a process of fossilization in which mineral deposits form internal casts of organisms.