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Manuel Quiring

Beautiful huge ammonite, 28,5kg. Specimen from masagascar. A natural white fossilized enamel and perfect spiral shape making this fossil even more rare and valuable. Truly a beautiful, wonderfully preserved specimen.
Perisphinctes is an extinct cephalopod mollusc belonging to the ammonites. It lived in the Upper Jurassic (172-149 million years ago), and its fossil remains are found on all continents.
Si tratta di animali di ambiente marino, caratterizzati da una conchiglia esterna composta prevalentemente di carbonato di calcio, sotto forma di aragonite, e in parte di una sostanza organica di natura proteica (conchiolina). La conchiglia era suddivisa internamente da setti in diverse camere, di cui il mollusco occupava solo l'ultima (camera d'abitazione). Le altre, che componevano il fragmocono (parte concamerata della conchiglia), erano utilizzate come "camere d'aria" (analogamente all'attuale Nautilus), riempite di gas e liquido camerale per controllare il galleggiamento dell'organismo. La pressione dei fluidi camerali era controllata da una sottile struttura organica tubolare riccamente vascolarizzata, in parte mineralizzata (il sifone), che attraversava tutti i setti e permetteva lo scambio di fluidi dal sangue e dai tessuti molli dell'animale alle camere tramite un processo di osmosi.

Jurassic (201.3 - 145 million years) - Madagascar

Large Ammonite - Fossilised shell - Perisphinctid - 47 cm

Fossils

Reserve price

No reserve price

Closing date

Saturday

Friday

Sunday

tomorrow

Monday

Tuesday

Budget

From

Location

The Netherlands

France

Spain

Italy

Germany

Taiwan

Hong Kong

Lithuania

Belgium

United Kingdom

Austria

Romania

Portugal

Switzerland

Greece

Poland

Singapore

Türkiye

Bulgaria

Japan

Slovak Republic

Size

S (10–40 cm)

XS (under 10 cm)

M (40–80 cm)

L (over 80 cm)

Dimensions

Height

Width

Depth

Object

Fossil tooth

Fossilised animal

Amber

Fossil skull

Fossil matrix

Raw mineral

Fossilised shell

Fossil teeth

Metaphysical stones

Fossil carapace

Fossil skeleton

Fossilised jaw

Fossilised plant

Taxidermy replica mount

Fossil plate matrix

Fossil fragment

Fossil bone

Fossilised claw

Fossil mortality plate

Fossilised egg

Fossilised wood

Fossilised tusk

Earrings

Rosary

Bracelet

Country of origin

Morocco

Madagascar

Indonesia

China

Asia

Myanmar

North America

Brazil

United States

Lebanon

Netherlands

India

Canada

Russia

Europe

Niger

Peru

Material

Silver

Resin

Gender

Women

Unisex

Condition

Natural

Restored

Composed

Enhanced

Good condition

Reassembled

Cast

Manipulated

As new - unused

Reconstructed

Good condition - used with some signs of wear

Excellent condition - barely used with minimal signs of wear

Good condition - used with small signs of aging & blemishes

Hand carved

As new

Excellent condition

Period

Cretaceous (145 - 66 million years)

Cretaceous, Upper (100.5 - 66 million years)

Neogene, Miocene (23.03 - 5.33 million years)

Neogene (23.03 - 2.58 million years)

Cretaceous, Lower (145 - 100.5 million years)

Paleogene, Eocene (56 - 33.9 million years)

Triassic (251.9 - 201.3 million years)

Devonian (419.2 - 358.9 million years)

Quaternary, Pleistocene (2.58 - 0.0117 million years)

Jurassic (201.3 - 145 million years)

Jurassic, Upper (163.5 - 145 million years)

Jurassic, Lower (201.3 - 174.1 million years)

Triassic, Middle (247.2 - 237 million years)

Devonian, Middle (393.3 - 382.7 million years)

Devonian, Lower (419.2 - 393.3 million years)

Ordovician (485.4 - 443.8 million years)

Cenozoic (66 - 0 million years)

Triassic, Lower (251.9 - 247.2 million years)

Carboniferous, Pennsylvanian (323.2 - 298.9 million years)

Quaternary (2.58 - 0 million years)

Paleogene (66 - 23.03 million years)

Paleogene, Oligocene (33.9 - 23.03 million years)

Neogene, Pliocene (5.33 - 2.58 million years)

Quaternary, Holocene (0.0117 - 0 million years)

Paleogene, Paleocene (66 - 56 million years)

Stone

Coral

Natural Pearl

Pearl

Certification

No laboratory report

Non-CITES species

Style

Antique

Edition

1st Edition

Exact colour

White

Mineral

Amethyst

Pyrite

Mineral form

Geode

Carving

Freeform

Obelisk

After 2000

Before 1400

1900-2000

Treatment

Conserved

Polished

Composite

Size on item

59 (EU) / 19 (IT) / 8 ¾ (US)

Pearl surface quality

Clean

Pearl luster

Good

Original/ Replica

Original/official

Refurbished original

Licensed replica

Reproduction/replica

Specimen

Megalodon

Ammonite

Dinosaur

Mosasaur

Spinosaur

Fossils

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Large Ammonite - Fossilised shell - Perisphinctid - 47 cm

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