Orthoceras

Natural Polished Orthoceras Fossil 
Photo Example Only

Measurements:
Length (approx):120 mm 
Width (approx): 37 mm
Weight (approx): 68 grams

NB: As this Fossil is natural it will include markings, inclusions or other patterning.
Sizes are approximates.

Orthoceras ("straight horn") is a genus of extinct nautiloid cephalopod. This genus is sometimes called Orthoceratites. Note it is sometimes misspelled as Orthocera, Orthocerus or Orthoceros 

Orthoceras fossils are common and have a global distribution, occurring in any marine rock, especially in limestone.

These are slender, elongate shells with the middle of the body chamber transversely constricted, and a subcentral orthochoanitic siphuncle. The surface is ornamented by a network of fine lirae. Many other very similar species are included under the genus Michelinoceras.

NB: As this Fossil is natural it will include markings, inclusions or other patterning.
Measurements are approximates.