American Fossils

(15 upcoming items)

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Ammonite Datylioceras Commune Jurassic Age Fossil: Ancient ammonite datylioceras commune. Jurassic age, Forcheim Germany. Measures 2.5" x 1.5" x 1.25", weighs 4.3 oz.

Apr 16, 2026

Ammonite Datylioceras Commune Jurassic Age Fossil

Cowboy Joe's Antiques

Est. $200-$300

Ancient Trilobite - Flexicalymene Meeki Fossil: Flexicalymene Meeki Trilobite. Upper Ordovician, Waynesville formation, Franklin Co. Indiana. Measures 3" x 2" x .75". Weighs 3.96 oz.

Apr 16, 2026

Ancient Trilobite - Flexicalymene Meeki Fossil

Cowboy Joe's Antiques

Est. $250-$350

Ancient Trilobite - Flexicalymene Meeki Fossil: Flexicalymene Meeki Trilobite. Upper Ordovician, Waynesville formation, Franklin Co. Indiana. Measures 3" x 3" x 1". Weighs 3.96 oz.

Apr 16, 2026

Ancient Trilobite - Flexicalymene Meeki Fossil

Cowboy Joe's Antiques

Est. $250-$350

Lot of Nine Fossilized Clams Pleistoncene Period: Lot of nine fossilized complete clam shells. Pleistocene Period. Quarter for scale.

Apr 16, 2026

Lot of Nine Fossilized Clams Pleistoncene Period

Cowboy Joe's Antiques

Est. $200-$300

Fossilized Porpoise Ear Bone RARE Miocene Period: Fossilized porpoise ear bone. Miocene period. Plum Point MD. Measures 1" x .75" x .5" and weighs .13 oz.

Apr 16, 2026

Fossilized Porpoise Ear Bone RARE Miocene Period

Cowboy Joe's Antiques

Est. $100-$150

Cyathocrinites and Platycrinites Fossils Mississippi Creek: Cyathocrinites and Platycrinites Fossils. From lower Mississippian Ramp Creek Limestones, Montgomery County Indiana. Measures 4.75" x 3".

Apr 16, 2026

Cyathocrinites and Platycrinites Fossils Mississippi Creek

Cowboy Joe's Antiques

Est. $200-$250

Petrified Coprolite Fossil Dinosaur Feces 100 Million Years Old: Petrified coprolite, unknown origin. Measures 2" x 1.5" x 1.25" and weighs 2 oz.

Apr 16, 2026

Petrified Coprolite Fossil Dinosaur Feces 100 Million Years Old

Cowboy Joe's Antiques

Est. $200-$350

Ancient Trilobite - Flexicalymene Meeki: Flexicalymene Meeki Trilobite. Upper Ordovician, McMillan formation, Butler County, Ohio. Measures 3" x 2" x 1". Weighs 4.79 oz.

Apr 16, 2026

Ancient Trilobite - Flexicalymene Meeki

Cowboy Joe's Antiques

Est. $80-$90

Petoskey Stone Michigan, USA Fossil: Petoskey fossil stone from Michigan. Measures 3" x 2.5" x .75" and weighs 8 oz.

Apr 16, 2026

Petoskey Stone Michigan, USA Fossil

Cowboy Joe's Antiques

Est. $90-$100

Pentremites Godoni Fossil: Pentremites godoni fossil. Upper Mississippian, Ridenhower Formation, St. Clair Co, Illinois. Weighs 1 oz. Approximately 1.5"

Apr 16, 2026

Pentremites Godoni Fossil

Cowboy Joe's Antiques

Est. $200-$250

Knightia Fossil Fish 50 million years old: Knightia fossil fish. Herring like fish. Approximately 50 million years old. Measures 4.5" x 3".

Apr 16, 2026

Knightia Fossil Fish 50 million years old

Cowboy Joe's Antiques

Est. $150-$200

Fossilized Turtle Shell Piece: Fossilized turtle shell piece. Measures 1.75" x .75" and weighs .5 oz.

Apr 16, 2026

Fossilized Turtle Shell Piece

Cowboy Joe's Antiques

Est. $40-$60

Fossilized Sand Dollar 150 million years old: Fossilized sand dollar. 150 million years old. Weighs 58g. Nice detail. Measures 3".

Apr 16, 2026

Fossilized Sand Dollar 150 million years old

Cowboy Joe's Antiques

Est. $90-$120

Trilobite Fossil 500 million years old: Trilobite fossil. 490-510 million years old. Measures 2.25" x 2".

Apr 16, 2026

Trilobite Fossil 500 million years old

Cowboy Joe's Antiques

Est. $80-$100

18.33 Ct Natural Fossil Coral Oval Cab: weight - 18.33 Ct / Size - 25.90 x 17.30 x 4.30 mm / Shape - Excellent Oval Cab / Origin - Brazil / Treatment - None

Apr 13, 2026

18.33 Ct Natural Fossil Coral Oval Cab

Est. $75-$150

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24

American Auctions

Monumental Ojibwe Calumet Pipe, with Fine Lead Inlay Burl Bowl

Navajo Late Classic Third Phase Blanket [Rug]

Mitchell and McGowan Sioux Chiefs and Warriors Taken at the Red Cloud Agency, ca 1877

Native American Art

Starts on:

Chicago, IL, US

Josef Rau Laterndluhr Long-Duration Vienna Regulator Clock

A Rare French Gilt Bronze Gravity Ball Waterwheel Industrial Clock

Patek Philippe 18K Gold Calatrava Wristwatch, Reference 3919, Circa 1996

American & European Timepieces

Fontaine's Auction Gallery

Starts on:

Pittsfield, MA, US

4 3/4' Graham Cave. Found by Josh Hamilton. Henderson County, Illinois.

5 1/8' Dovetail. Speckled Avon Chert. Henderson County, Illinois.

3 5/16' x 1 1/8' Dalton. Colorful Chert. Mason County, Illinois.

Native American & Pre-Columbian Auction

Heartland Artifact Auctions

Starts on:

Quincy, IL, US

American Fossils

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