fms.fossilsThis is one of the best large pyrite ammonite fossils of the species Crucilobiceras densinodulum I have ever found. When given a quick polish they give off a beautiful golden shine. Rotating the ammonite like this shows off that shine better than a single angle photo can capture. These ammonites are often preserved on both sides, as this one is. Fossils preserved in iron pyrite are not that uncommon, but these ammonites are some of the most impressive to be found anywhere in the world.