Orthoceras fossilized on jet pendant necklace. Ordovician cephalopod with a calcium carbonate shell which provided excellent physical protection against their natural predators. This necklace is a fossilized shell from this animal that has been preserved in great detail. You can even see the individual chambers the nautiloid had in its shell.
As the animal grew, it would seal off chambers of its shell by building internal walls called septa. The septa only had one opening, through which ran a thin tube of tissue called a siphuncle.
This necklace is an Orthoceras shell which has been fossilized into a pale gray material over a jet black base. The fossil has been hand polished to reveal the chambered septa that the animal once had is still visible 350,000,000 years later. Pendant measures 2” long x 7/8” wide. Necklace measures 22” long.
As the animal grew, it would seal off chambers of its shell by building internal walls called septa. The septa only had one opening, through which ran a thin tube of tissue called a siphuncle.
This necklace is an Orthoceras shell which has been fossilized into a pale gray material over a jet black base. The fossil has been hand polished to reveal the chambered septa that the animal once had is still visible 350,000,000 years later. Pendant measures 2” long x 7/8” wide. Necklace measures 22” long.
