Orthoceras Jewelry Box Round Stone Rock Fossil Polished Great Healing Properties Natural Black Gemstone

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Diameter: 4-5/8"
Height: 1-1/4"
Sold: 1 plates as shown in the images.
Buyer will receive exact item as pictured


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 (Sweet 1964:K222).

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 (Sweet 1964:K224). Many other very similar species are included under the genus Michelinoceras.

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