macro slices of opalized and pyrite ammonite, ammolite crystal silicate and fools gold silver metal fossil

ammolite ammonite ammonite fossil shell ammonoidea amonite ancient animal archaeology cephalopod cephalopoda cephalopoda close close-up closeup cut fossilized fossils gem gemstone geology iridescent isolated macro marine mineral mineralogy nature nautilus ocean old opalized opalized paleontology prehistoric rock sea sea life seashell shell shellfish slice snail snail spiral stone swirl