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Manuel Quiring

This is a thick, 17 cm wide cut and polished Cleoniceras ammonite from Mahajanga Province, Madagascar. It has been agate replaced, and many of the internal chambers are lined with calcite crystals. Exhibitor stands included.
This is an extinct cephalopod mollusc belonging to the ammonites. It lived in the Lower Cretaceous (150-100 million years ago), and its fossil remains are found on all continents.
These are marine animals, characterized by an external shell composed mainly of calcium carbonate, in the form of aragonite, and partly of an organic substance of a protein nature (conchiolin). The shell was internally divided by septa into several chambers, of which the mollusc occupied only the last (living chamber). The others, which made up the phragmocone (chambered part of the shell), were used as "air chambers" (similarly to the current Nautilus), filled with gas and chamber liquid to control the buoyancy of the organism. The pressure of the chamber fluids was controlled by a thin, richly vascularized, partly mineralized tubular organic structure (the siphon), which passed through all the septa and allowed the exchange of fluids from the blood and soft tissues of the animal to the chambers through a process of osmosis.

Cretaceous, Lower (145 - 100.5 million years) - Madagascar

Ammonite - Fossilised shell - Aioloceras (Cleoniceras) sp. - 17 cm

Fossils

Reserve price

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Closing date

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Location

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Italy

The Netherlands

France

Germany

Taiwan

Lithuania

United States

Hong Kong

Belgium

Poland

Romania

Türkiye

Portugal

Austria

United Kingdom

Sweden

Bulgaria

Greece

Czech Republic

Dimensions

Height

Width

Depth

Object

Fossil tooth

Fossilised animal

Amber

Fossil teeth

Fossil matrix

Raw mineral

Fossil skeleton

Fossilised shell

Fossil cabochon

Fossil fragment

Fossil plate matrix

Metaphysical stones

Fossil vertebra bone

Carved mineral

Fossil skull

Earrings

Fossilised jaw

Fossil mortality plate

Fossil bone

Fossilised plant

Necklace

Fossilised claw

Fossil carapace

Necklace with pendant

Bracelet

Country of origin

Morocco

Madagascar

Indonesia

China

Asia

Brazil

Lebanon

Myanmar

Netherlands

North America

U.S.

Baltic states

Canada

India

Russia

Turkey

Africa

Afghanistan

Material

Silver

Gold-plated

Yellow gold

Stone

Gender

Women

Unisex

Condition

Natural

Restored

Enhanced

As new - unused

Reassembled

Manipulated

Excellent condition - barely used with minimal signs of wear

Good condition

Good condition - used with small signs of aging & blemishes

Reconstructed

Composed

Fair condition

Very good condition - slightly used with small signs of wear

Period

Cretaceous (145 - 66 million years)

Cretaceous, Upper (100.5 - 66 million years)

Neogene, Miocene (23.03 - 5.33 million years)

Paleogene, Eocene (56 - 33.9 million years)

Quaternary, Pleistocene (2.58 - 0.0117 million years)

Neogene (23.03 - 2.58 million years)

Devonian (419.2 - 358.9 million years)

Cretaceous, Lower (145 - 100.5 million years)

Triassic (251.9 - 201.3 million years)

Jurassic (201.3 - 145 million years)

Jurassic, Lower (201.3 - 174.1 million years)

Devonian, Middle (393.3 - 382.7 million years)

Ordovician (485.4 - 443.8 million years)

Jurassic, Middle (174.1 - 163.5 million years)

Cambrian (541 - 485.4 million years)

Jurassic, Upper (163.5 - 145 million years)

Triassic, Lower (251.9 - 247.2 million years)

Quaternary (2.58 - 0 million years)

Triassic, Middle (247.2 - 237 million years)

Triassic, Upper (237 - 201.3 million years)

Ordovician, Upper (458.4 - 443.8 million years)

Carboniferous (358.9 - 298.9 million years)

Silurian (443.8 - 419.2 million years)

Neogene, Pliocene (5.33 - 2.58 million years)

Cenozoic (66 - 0 million years)

Coral

Blood Coral

Pearl

Natural Pearl

Lapis lazuli

Carnelian

Freshwater cultured pearl

Turquoise

Certification

No laboratory report

Fineness

18 kt.

Style

Ancient Egypt, Late Period

Ancient Asian

Art Deco

Baroque

Old European cut

Oval

Exact colour

White

Mineral

Labradorite

Amethyst

Petrified wood

Malachite

Quartz

Mineral form

Freeform

Sphere

Tumbled

Bowl

Obelisk

Pyramid

After 2000

1900-2000

Before 1400

Size on item

Adjustable

Extra large (19.5 - 20 cm)

Medium (17 - 18 cm)

Pearl surface quality

Clean

Lightly spotted

Pearl luster

Good

Very good

Treatment

Fossils

This object is no longer available, but there’s still lots to explore

Ammonite - Fossilised shell - Aioloceras (Cleoniceras) sp. - 17 cm

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Fossils

This object is no longer available, but there’s still lots to explore

Ammonite - Fossilised shell - Aioloceras (Cleoniceras) sp. - 17 cm

Popular in Fossils

1126 objects

Related collections