Pyritized Ammonite, Pleuroceras d67347ed575a06e2c7cd575b244d9183 precipitated the decline of the

precipitated the decline of the Ursus spelaeus

Topaz comes in many different hues

some actually grew over 13 feet (4 metres) long

needing no cutting or polishing

Pyritized Ammonite, Pleuroceras d67347ed575a06e2c7cd575b244d9183 precipitated the decline of thePyritized Ammonites are considered some of the most collectable type of Ammonite fossil specimens. Iron Pyrite, also known as "Fool's Gold" enters the Ammonites chambers, replacing the animal's structure cell by cell. When the cellular replacement process goes just right, a magnificent fossil specimen such as the one pictured is created. The name Pyrite is derived from the Greek (purits), "of fire" or "in fire," from (pur), "fire. Ammonites are an