Ammonite
- pyritized
Cephalopods
Pyrite
Bifericeras
Jurassic
Minerally
replaced with Pyrite. They have been split and polished to a mirror finish.
One has original shell pearl essence on uncut side. They truly do glow
with "fools gold" sparkle!
These ammonites have been minerally replaced with Pyrite. They have been split and polished to a mirror finish. One has original shell pearl essence on the uncut side. They truly do glow with "fools gold" sparkle!Animals which died in the ancient Jurassic sea, deposited in the soft sediment. Ammonites are extinct relatives of today's octopus and squids. They had coiled shells which were internally divided into compartments. The animal lived in the outermost chamber, the inner chambers helped to regulate buoyancy.
Ammonites were named for Amun (also spelled Ammon), an ancient Egyptian god who is pictured as having ram's horns behind each ear (which look like ammonites).
Ammonite fossils are found in great quantities and are used as an index fossil. Index fossils are commonly found fossils that are limited in time span. They help in dating other fossils.