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FOSSIL PENDANT -ORTHOCERAS 35.30 CTS [GT 1903]

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ORTHOCERAS PENDANT

Orthoceras was a ancient mollusk that lived more than 400 million years ago. The name means straight horn, referring to the characteristic long, straight, conical shell. The preserved shell is all that remains of this ancestor of our modern-day squid.pin on top-ready to wear.We have taken a photo of both sides of the pendant even though the fossil is on one side only.

Well polished

Found in Morocco 

 

orthoceras drawing

WEIGHT:  35.30 CTS APP

SIZE:  50 X 10  X 10  MM APP

 

The soft body lived in the last open-ended segment at the large end of the conical shell. As the body grew and the housing segment became too small, a dividing wall, called the septa, grew to separate the old “home chamber” from the new one. The differences in the composition of these shell parts allowed for differences in fossilization so the parts can be seen.

The siphuncle is a tube that runs the entire length of the shell, through each of the chambers. This tube had two functions. Once filled with water, the nautiloid could force the water out, propelling itself backward with a kind of jet propulsion. By releasing the water and leaving air space, the tube could serve as a bouyancy device allowing the animal to rise and lower itself to different depths.

These straight shelled nautiloids ranged in size from less than a centimeter to more than 14 feet long!

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sedagems
sedagems
Hi Welcome to the Sedagems store, Run by Paul Sedawie and specializing in Australian sapphires and gems stones he has collected on his many buying trips world wide. All stock has a money back guarantee as your continued business is our business.
Mermaid Waters, Australia
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  • rustynut
    rustynut
    Positive

    Good stone great service

  • martin11
    martin11
    Positive

    Great thank very much, lovely pearls.

  • philsgems
    philsgems
    Positive

    Nice piece of rough. thankyou

  • philsgems
    philsgems
    Positive

    Nice stone. Thankyou

  • philsgems
    philsgems
    Positive

    Have received the rough. Nice colour. Thankyou

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Valid Until
2nd Jan 2025

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Shipping Details

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$16.00 21 days via Registered Shipping
Ships from:
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Overview

Listing Type : Standard
Product ID : 565589
Starts : 18th December 2024 08:00 pm PST
* All prices are in USD