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Ammonite fossilized millions of years old

AED 1,000

CAPITAL

4 items live

Item Details

Age

10+ years

Condition

Perfect inside and out

Usage

Still in original packaging

Posted on: 4th January 2026

Description

Ammonites are extinct marine mollusks that are more closely related to modern-day octopuses and squids than to the nautilus they resemble.
These specific pieces have been cut and polished to reveal their internal structure, which tells a fascinating story of prehistoric biology.
Key Features of Your Specimen
Septa and Chambers: The "walls" you see dividing the shell are called septa. The animal lived only in the largest, outermost chamber. As it grew, it moved forward and built a new wall behind it, creating a series of empty chambers used for buoyancy.
Mineralization: Over millions of years, minerals (likely calcite or quartz) seeped into the hollow chambers. The variety of colors you see—from earthy browns to translucent yellows—depends on the specific mineral content of the sediment where they were buried.
Suture Patterns: The intricate, wavy lines visible on the surface are called sutures. These represent the complex "stitching" where the internal septa met the outer shell. In ammonites, these patterns became increasingly complex over evolutionary time to help the shell withstand deep-water pressure.
Fast Facts
Age: These are likely from the Jurassic or Cretaceous periods, making them anywhere from 66 to 200 million years old.
Golden Ratio: They are famous examples of the Logarithmic Spiral in nature, often associated with the Fibonacci sequence.
Extinction: They went extinct at the same time