These fascinating 'Fire Ammonites' are from Madagascar, where their iridescent shells have naturally formed during the fossilization process, creating this spectacular specimen!
These Madagascan Cleoniceras Ammonite is also known as Red or Iridescent Ammonite, have been highly polished to reveal the naturally occurring and desirable iridescent lustre.
Very similar to the Ammolite fossils from Alberta, Canada, described as Ammolite this play of colours is caused by the play of light against aragonite which replaced the original chitin shell, when fossilisation took place.
This Ammolite shell is often used in jewellery manufacturing and is much sort after by collectors of fossils as well as semi precious gem collectors. Ammonites of this type are becoming much more difficult to acquire.
Ammolite;
Recognised by the Coloured Stones Commission in 1981 as a gemstone, Ammolite primarily comprised of Aragonite which is also the substance of natural pearls. Unlike most other gem, where the array of colours come from light refraction, the iridescent colour of Ammolite comes from interference with the light that rebounds from the stacked layers of the aragonite. The ordered thicker stacks cause red gem colour, the less ordered thinner stacks for the green gem colour and very thin unordered stacks for the blue colours.
Genus
Cleoniceras Ammonite sp.
Other Nomenclature
Iridescent Ammonites
Red Ammonites
Fire Ammonite
Rainbow Ammonite
Ammolite Ammonite (Similar)
Polished Ammonites
Madagascan Ammonites
Ammonites from Madagascar
To view above Ammonite CLICK HERE
To view above Ammonite CLICK HERE
To view above Ammonite CLICK HERE
To view above Ammonite CLICK HERE
To view above Ammonite CLICK HERE
To view above Ammonite CLICK HERE
To view above Ammonite CLICK HERE
To view above Ammonite CLICK HERE
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