COINS

Ammonite Fossil

image-0
thumbnail-0
thumbnail-1

Key Facts & Value

AI

Key Fact

1

Description

This is a fossilized ammonite, a marine mollusk that lived millions of years ago. The specimen displays a distinct spiral shape, characteristic of its species. The exterior of the shell is textured with ridges, and the internal structure is partially visible, revealing the chambers of the creature's past home. It appears to be a light, sandy-colored stone with hints of blue-grey discoloration. The fossil measures approximately four inches in diameter.

2

History

Ammonites are extinct marine cephalopods that were abundant during the Mesozoic Era, from the Jurassic period to the end of the Cretaceous period. They are related to modern-day squid and octopus, but their shells are more similar to that of a Nautilus. The fossil record of ammonites is extensive, providing valuable insights into prehistoric marine life and the history of the Earth.

3

Facts

Ammonites are popular among fossil collectors and paleontologists alike for their beautiful preservation and evolutionary significance. Their coiled shells served as protective homes and buoyancy regulators. The variety of ammonite shapes and sizes is astounding, with some species reaching up to two meters in diameter. Their extinction coincided with that of the dinosaurs, marking the end of an era.

Value Fact

Ammonite fossils vary greatly in price depending on size, preservation quality, and rarity. Smaller, common specimens can be found for as little as $10-$20. Larger, exceptionally well-preserved, or unusually patterned ammonites can fetch hundreds or even thousands of dollars. Demand is driven by collectors, decorators, and educational institutions.

Item Details

Official Details

CategoryCoins
Brand-
Character-
Length-
Width-
Weight-
Person-
Coins TypeFossil
Denomination-
Currency-
Obverse DescriptionSpiral shell imprint
Obverse CreatorAmmonite
Reverse DescriptionImprint of coiled shell
Reverse CreatorAmmonite
Mint or Printing Press-
DiameterApprox 4 inches
Thickness-
Production Type-
Edge Type-
Mintage-
Coins Topic/Theme-
Country / Empire-
Start Year-
End Year-
Coin Product Name-
Mint Mark-
Obverse Objects-
Reverse Objects-
ShapeSpiral
Material-
Design Variation-
Design Variation Details-
Year Displayed-

Variation Details

Grading Company-
Grade-
Coins Error-
Alignment-

lilmrsmartin Details

Certification Number-
Logo

Feed Your Passion.

Collection Management

My collection

© 2026 Collectbase Inc. All rights reserved.
Google PlayApp Store

Collectibles.com is operated by Collectbase Inc., a Delaware corporation. Collectible valuations, price estimates, and AI-assisted identifications are provided for informational and reference purposes only and do not constitute professional appraisals, financial advice, or guarantees of market value. Trademarks, card images, and intellectual property belonging to third-party rights holders are displayed solely for identification, valuation reference, and collection management purposes; Collectbase Inc. is not affiliated with, endorsed by, or sponsored by any such rights holders. User-generated content reflects the views of individual community members and not those of Collectbase Inc. This platform may earn affiliate commissions on qualifying purchases made through third-party links. The platform is provided "as is" without warranties of any kind, and Collectbase Inc. shall not be liable for any damages arising from use of this platform or reliance on its content. For full details governing your use of this platform and our privacy practices, see our Terms of Service and PrivacyPolicy.

© 2026 Collectbase Inc. All rights reserved.

This site and associated apps contain copyrighted material including card images, trademarks, and text belonging to The Pokémon Company International, Nintendo, GAME FREAK inc., Wizards of the Coast, Major League Baseball Properties, Inc., NBA Properties, Inc., NFL Properties LLC, NHL Enterprises, L.P., Topps, Panini America, Inc., Upper Deck, and all other respective rights holders. Such material is displayed solely for the purposes of identification, pricing reference, collection management, and to facilitate the buying, selling, and trading of physical collectibles by collectors. Collectbase Inc. is not affiliated with, endorsed by, or sponsored by any of the foregoing entities, and no challenge to their intellectual property rights or ownership is intended or implied.