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✦ Authentic Fossils

Exceptional specimens available upon request

Discreet access to paleontological rarity.
Here you will find a few examples of authentic dinosaur fossils we are able to offer.

Simoneko grants discerning collectors access to some of the most complete and exclusive specimens available on the market.

Including icons of paleontology such as the formidable Tyrannosaurus rex, swift and fearless raptors, masters of the skies like Pteranodon, and ancient marine rulers such as Mosasaurus and Ichthyosaurus.

✦ Selected specimens​

Giants of the Earth and architects of Life

They ruled ancient plains, shaped ecosystems, and left their mark in stone. Terrestrial fossils reveal the most iconic dinosaurs — from the fierce T. Rex to the majestic Triceratops. Each bone holds a story of survival, migration, and the evolutionary brilliance of life on land.

Privacy notice

In accordance with our privacy policy and in order to protect the identity of our clients and suppliers, this website features only a curated selection of species that may be available on the market, rather than listing specific specimens for sale. Given the sensitive and exclusive nature of our activity, detailed information – including images, provenance, documentation, and pricing – is shared solely upon individual request.

This approach ensures the security, discretion, and legal compliance of all transactions. All information shared in this context remains strictly confidential and is subject to our confidentiality terms.

Tyrannosaurus Rex Fossil Skeleton for sale

Tyrannosaurus rex

The most iconic predator
Triceratops fossil skeleton for sale

Triceratops Horridus Skeleton

The three-horned colossus
Tenontosaurus fossil skeleton for sale

Tenontosaurus

The Sinew Lizard
Pteranodon fossil skeleton for sale

Pteranodon

Toothless Wing
Deynonychus fossil skeleton for sale

Deinonychus Antirrhopus

Terrible claw
Edmontosaurus Fossil Skeleton for sale

Edmontosaurus

The Duck-Billed Titan
Ichthyosaurus Fossil for sale

Ichthyosaurus

The Fish-Lizard
Triceratops fossil skull for sale

Triceratops Horridus Skull

Crowned Giant of the Cretaceous

Are you looking for a specific fossil?

Whether scientifically significant, visually exceptional, or simply to enhance your collection – don’t hesitate to reach out. From the most common to the rarest specimens, if it exists, we’ll find it through our trusted global network, with discretion and precision at every step.

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Authentic fossils ✦

Timeless relics of a vanished world ✦

Understanding rarities

What makes a specimen exceptional? We take this following factors into consideration.

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Completeness

Percentage of skeleton preserved

Preservation quality

Bone condition and mineralization

Scientific significance

New discoveries or unique features

Provenance

Legal documentation and location

Size and display impact

Museum-quality presence

Market rarity

Availability in private hands

Tyrannosaurus rex

“The most iconic predator of the late cretaceous”

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Scientific Profile

Period

Late Cretaceous (66–68 million years ago)

Location

Western North America

Height (at hips)

Up to 12 meters (39 feet)

Weight

Estimated 6–10 tonnes

Diet

Carnivorous, apex predator and opportunistic scavenger

  • Enormous skull (up to 1.5 m) with forward-facing vision
  • Powerful jaws and the strongest known bite force of any terrestrial animal
  • Serrated teeth up to 30 cm long
  • Two-fingered forelimbs and a long, muscular tail for balance

Due to extreme rarity, scientific significance, and global cultural status, T-Rex specimens command some of the highest values in the fossil market. Museum-grade skeletons or skulls are seen as prestige acquisitions with long-term value.

1997

“Sue” — $8.4 million
Sold at Sotheby’s in 1997. Now housed at the Field Museum in Chicago.

2020

“Stan” — $31.8 million
Sold by Christie’s New York in 2020.

2023

“Maximus” (skull only) — $6.1 million
Sold at Sotheby’s in 2023. A large, well-preserved skull, highlighting sustained market demand even for partial specimens.

Due to the confidential nature of the specimens, the images provided are non-contractual and intended solely for illustration.

Tyrannosaurus Rex Fossil Skeleton for sale

Triceratops Horridus Skeleton

“The Three-Horned Colossus”

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Scientific Profile

Period

Late Cretaceous (66–68 million years ago)

Location

Western North America

Size

Up to ~9 m (30 ft) long

Weight

Estimated over 6 tonnes

Diet

Herbivorous, its diet consisted entirely of plant material.

  • Distinctive three-horned skull with a broad bony frill
  • Herbivorous, likely lived in herds
  • Powerful jaw muscles for biting tough vegetation

Rarity & Appeal

Triceratops remains one of the most iconic and desirable dinosaur genera among collectors, institutions, and natural history museums.

Complete or near-complete skeletons are extremely rare, with high visual impact and strong public recognition, making them valuable for both display and investment.

Pricing Trends

Market reporting from the Financial Times indicates that “near‑complete dinosaur skeletons (around 70 % complete) regularly attract prices in the multi‑million dollar range; Triceratops skulls alone can fetch $300k–500k, and full specimens – even partial ones – often land in the $4 million to $10 million+ zone for high completeness and public notoriety”.

2021

“Big John” skeleton (largest known Triceratops skeleton) — Sold for €6.6 million (~$7.7 M) in Paris.

The skeleton was approx 60 % complete, with a skull about 75 % complete, and marks the record-breaking sale for a Triceratops. It was showcased in Trieste and Tampa museum.

Due to the confidential nature of the specimens, the images provided are non-contractual and intended solely for illustration.

Triceratops fossil skeleton for sale

Tenontosaurus

“The Sinew Lizard”

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Scientific Profile

Period

Early Cretaceous (approx. 115–108 million years ago)

Location

North America

Length

Up to 6-8 meters (20 – 26 ft)

Weight

~1,000–1,200 kg

Diet

Herbivorous – likely fed on ferns, cycads, and early angiosperms

Locomotion

Primarily quadrupedal but could move bipedally when running or browsing

  • Long, stiffened tail - Over 60 vertebrae, likely used for balance and possibly defense.
  • Robust forelimbs - Strong arms with a thumb spike, possibly for defense or food gathering.
  • Gastroliths - Stomach stones found in some specimens, used to help digest plant matter.
  • Deinonychus association - Numerous specimens were found near the carnivorous dinosaur Deinonychus, suggesting predatory behavior or scavenging.

Tenontosaurus is a relatively common Early Cretaceous ornithopod from North America. While scientifically significant (especially due to its predator-prey ties with Deinonychus), it does not rank as a high-profile fossil in the commercial market.

It occupies a mid-tier niche: desirable for academic and educational purposes, but less in demand among trophy collectors seeking theropods or ceratopsians.

2008

The only verified auction record for Tenontosaurus tilletti is the Bonhams juvenile skeleton (est. $150K–$180K, sold or tentatively valued) discovered in fall 2008 in Montana.  No certified high-value auctions featuring adult or richly articulated Tenontosaurus specimens have surfaced since.

Due to the confidential nature of the specimens, the images provided are non-contractual and intended solely for illustration.

Tenontosaurus fossil skeleton for sale

Pteranodon

“Toothless Wing” Icon of the Cretaceous Skies

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Scientific Profile

Period

Late Cretaceous (approx. 88–84 million years ago)

Location

Primarily found in North America. Most notably in the Niobrara Formation (Kansas, Nebraska, South Dakota)

Wingspan

5.5 – 7 meters (18–23 ft)

Body length

~2 meters (6.5 ft)

Weight

~20–25 kg (44–55 lbs)

Diet

Carnivorous piscivore. Likely fed on fish and squid, skimmed from ocean surface

Species

Pteranodon sternbergi and Pteranodon longiceps were closely related flying reptiles – but not dinosaurs. and differed in both anatomy and age.

  • Toothless break - Pteranodon means “winged and toothless.”. Unlike many earlier pterosaurs, it had a long, sharp beak with no teeth, adapted for catching fish.
  • Large wingspan - Making it one of the largest flying reptiles of its time.
  • Efficient Soaring Flight - Likely soared like modern seabirds (e.g., albatrosses), using updrafts and thermals over inland seas.
  • Sexual Dimorphism - Males were larger with more prominent crests; females smaller and less ornamented - suggesting sexual display roles.

Despite its massive wingspan, Pteranodon fossils are exceptionally rare. Its fragile, hollow bones were perfect for flight but seldom survived fossilization. Complete specimens with solid provenance are highly sought after by museums and elite collectors.

Full skeletons rarely reach the open market, and when they do, they command high prices and attract intense competition due to their extreme scarcity.

2023

“Horus” – The Sotheby’s Masterpiece – Final sale price: $3.932 million USD

Fully matured adult male Pteranodon longiceps, excavated in 2002 from Logan County, Kansas (Niobrara Formation, Smoky Hill Chalk Member). Wingspan ~20 feet (6 m), body length ~9 ft 9 in, comprised of 107 fossil bones with minimal restoration.

Due to the confidential nature of the specimens, the images provided are non-contractual and intended solely for illustration.

Pteranodon fossil skeleton for sale

Deinonychus antirrhopus

“Terrible Claw”

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Scientific Profile

Period

Early Cretaceous (~115–108 million years ago)

Location

Mainly found in the United States (Montana, Wyoming, Oklahoma), especially in the Cloverly Formation and Asia.

Height (at hips)

~1.2 meters (4 ft)

Length

~3 / 3.5 meters (10-11.5 ft)

Weight

~70–100 kg

Diet

Carnivorous. Deinonychus was a meat-eating predator, likely preying on herbivorous dinosaurs.

  • Key fossil that helped establish the dinosaur–bird evolutionary link.
  • Fast, agile predator with possible social hunting strategies. Likely a pack hunter, preying on medium-sized herbivores like Tenontosaurus.
  • Iconic sickle claw (~10—13 cm) on each foot that was used for slashing or gripping prey

Deinonychus antirrhopus holds a distinct place in the fossil market as one of the most valuable non-tyrannosaurian theropods.

Its unique combination of scientific impact, pop-cultural recognition, and genuine rarity has made it highly desirable among both collectors and researchers.

2022

Deinonychus antirrhopus skeleton “Hector” — $12.4 million — Christie’s

First public sale of its kind — a near-complete, high-profile specimen inspiring Jurassic Park Franchise. It is the only Deinonychus skeleton ever to reach auction and represents the most complete specimen known, in private hands.

Due to the confidential nature of the specimens, the images provided are non-contractual and intended solely for illustration.

Deynonychus fossil skeleton for sale

Edmontosaurus

“The Duck-Billed Titan”

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Scientific Profile

Period

Late Cretaceous (approx. 73–66 million years ago)

Location

North America – primarily Alberta (Canada) and Montana, South Dakota, Wyoming (USA)

Length

9–13 meters (30–43 feet)

Weight

~4–7 tons (possibly up to 15 t in rare cases)

Diet

Herbivorous. Its diet likely consisted of a wide range of low to mid-height vegetation

  • Soft Tissue Preservation - Specimens like “Dakota” (NDGS 2000) and AMNH 5060 preserved skin, muscle, tendons, and even potential gut contents, offering rare insight into dinosaur biology
  • Beak & Cheek Structures - Evidence of a keratinous beak and fleshy cheeks or cheek-like structures to hold food while chewing.
  • Bone Beds - Found in large bonebeds, suggesting herding or social behavior.

Edmontosaurus is one of the most commonly found dinosaurs in North America, particularly in rich fossil sites such as the Hell Creek Formation (USA) and the Horseshoe Canyon Formation (Canada).

This abundance ensures a steady flow of fossils to the market. However, high-quality, near-complete specimens – especially those with skin impressions or well-preserved anatomical articulation – are much rarer.

These premium-tier fossils can reach prices close to $500,000, while exceptional specimens (such as “mummies”) or museum-grade mounts can easily exceed $1 million, due to their significant scientific and display value.

No sourced information available.

Due to the confidential nature of the specimens, the images provided are non-contractual and intended solely for illustration.

Edmontosaurus Fossil Skeleton for sale

Ichthyosaurus

“The Fish-Lizard”

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Scientific Profile

Period

Early Jurassic (~201 to 183 million years ago)

Location

Mostly found in Western Europe, especially in England (notably Lyme Regis, Dorset), Germany, Belgium

Length of skull

~1.5 to 3 meters (5.2 to 10 ft)

Weight

Estimated 300—500 kg

Diet

Carnivorous: fish, squid, ammonites (suction feeding & sharp teeth)

  • Tail - Crescent-shaped fluke for propulsion.
  • Ichthyosaurus was one of the first extinct marine reptiles ever studied, thanks in part to fossil discoveries by Mary Anning in the early 1800s.
  • Excellent transitional example of a marine-adapted reptile (convergent evolution with dolphins and sharks).

Decorative appeal
Well-prepared wall-mount Ichthyosaurs are highly sought after for display by private collectors and boutique museums

Educational value
Favored for teaching evolutionary biology and marine reptile adaptation

Historic charm
Associated with early paleontological discoveries (esp. Lyme Regis fossils)

In recent years, Ichthyosaur skeletons have become popular fixtures at natural history auctions, appealing to both collectors and museums for their beauty, completeness, and historical significance. While these fossils are more available than dinosaur remains, museum-grade skeletons with articulated bones, visible embryos, or 3D mounts remain rare and can command six-figure prices, especially when prepared to high aesthetic and scientific standards.

2020

Fossilized Ichthyosaur Mother with Embryos — Sold privately in Europe (2020s) for ~€250,000, due to rarity and preservation.

2020

Stenopterygius quadriscissus — a marine reptile closely related to Ichthyosaurus offered at Christie’s London – 28 October 2020. The specimen featured anatomical detail rare for slab fossils – including stomach contents and three-dimensional elements – and was estimated at £100,000 to £150,000, reflecting its museum-quality preservation. Although the final hammer price was not publicly disclosed, similar-to-higher-end specimens appearing in comparable sales have been valuated in the range of $500,000–$750,000 USD

2022

Leptopterygius quadriscissus skeleton — a close relative of Ichthyosaurus—sold at Bonhams Paris on December 13, 2022 for €48,255, mounted in a striking three-dimensional posture typical of Holzmaden finds.

2023

Complete Ichthyosaur Skeleton (Lyme Regis) — Bonhams, London (2023) – Sold for £100,000 (~$125,000 USD) – ~2 meters long; fully mounted with partial original bone

Due to the confidential nature of the specimens, the images provided are non-contractual and intended solely for illustration.

Ichthyosaurus​ complete fossil skeleton

Triceratops Horridus Skull

“Crowned Giant of the Cretaceous”

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Scientific Profile

Period

Late Cretaceous (66–68 million years ago)

Location

Western North America

Length of skull

Up to 2.5 meters (8.2 feet)

Weight

Estimated 300—500 kg

Diet

Herbivorous, its diet consisted entirely of plant material.

  • Distinctive three-horned skull with a broad bony frill
  • Herbivorous, likely lived in herds
  • Powerful jaw muscles for biting tough vegetation

Recent high-profile auctions, such as the exceptional Triceratops skull sale at Sotheby’s reflect a sustained demand for these specimens.

Combined with robust market fundamentals (e.g., impressive auction results for more complete specimens), the Triceratops market continues to be one of the most dynamic and high-stakes sectors in paleontological collectibles.

2025

A large, highly complete Triceratops skull from the Hell Creek Formation (Wyoming) was auctioned. The estimate was between $400k–600k USD. Final sale price was not publicly disclosed, but this remains one of the most important skulls offered recently, due to its extraction in a single block and exceptional preservation

Due to the confidential nature of the specimens, the images provided are non-contractual and intended solely for illustration.

Triceratops fossil skull for sale
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