Madagascar
Dimensions
3.3"/8.5cm diameter
Weight
134g
Images show One Specimen at
different view points
Options
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Iridescent Ammonite Image 2 - NA0652 [a] |
| £35.00 |
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Iridescent Ammonite Image 3 - NA0652 [b] |
| £35.00 |
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Iridescent Ammonite Image 4 - NA0652 [c] |
| £35.00 |
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Iridescent Ammonite Image 5 - NA0652 [d] |
| £35.00 |
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Description
Superb Madagascan Cleoniceras Ammonite specimen, also known as a Redor Iridescent Ammonite
Condition Report
A highly polished Ammonite revealing extreme intensity of colours demonstrated in this specimen, with a good variety of greens, reds and even purple, which is far less common.
A Superb example of this Genus type and of the Fossils effect of iridescence, excellent size and condition
Information
The iridescent Cleoniceras is very similar to the Ammolite fossils from Alberta, Canada, described as Ammolite, these colours are 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 and with these attributes 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 cause the green gem colour and very thin unordered stacks form the blue colours.
Genus
Cleoniceras Ammonite sp.
Other Nomenclature
Iridescent Ammonites, Iridescent Ammonoids, Madagascan Ammonite, Red Ammonites, Rainbow Ammonites, Rainbow Ammonoids, Madagascan Ammonoids
Location
Mahajanga, Madagascar
Geological age
Mesozoic Era, Middle Cretaceous Period, Albian Stage, around 99-112 million years ago