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Green River Formation Fossils

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Juvenile Ichthyosaur fossil from Holzmaden Germany, Jurassic aged ancient sea life.

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Pyritized Crinoid (Sea Lilly) | Seirocrinus subangularis | Holzmaden, Germany

Pyritized Crinoid (Sea Lilly) | Seirocrinus subangularis | Holzmaden, Germany

$39,000.00 - $39,000.00
$39,000.00
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$39,000.00
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Russian Cave Lion (Panthera spelaea) Skull | Russia

Russian Cave Lion (Panthera spelaea) Skull | Russia

$95,000.00 - $95,000.00
$95,000.00
$95,000.00 - $95,000.00
$95,000.00
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Shop Fossil Fish
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    "Mini" Free Form Authentic Dinosaur Coprolite End Slice 💩 | Unpolished

    In Stone Fossils

    Recieve an unpolished "mini" slice of Jurassic Dinosaur Coprolite (feces) from Moffat County, Colorado. Matte look on one single side and left raw ...

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    Double Knightia eocaena 100% Natural | Green River Formation

    In Stone Fossils

    Knightia fossil found from our private quarry with beautiful reddish-gold toned iron mineral replacement of which our quarry is prized for. This be...

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    Picture Sandstone | Arizona Sierra

    In Stone Fossils

    Arizona Sierra is found in Northern Arizona. The design patterns are natural. Its color is achieved by heat treating the stone. This causes the iro...

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    Picture Sandstone | Arizona Sierra

    In Stone Fossils

    Arizona Sierra is found in Northern Arizona. The design patterns are natural. Its color is achieved by heat treating the stone. This causes the iro...

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    Picture Sandstone | Arizona Sierra

    In Stone Fossils

    Arizona Sierra is found in Northern Arizona. The design patterns are natural. Its color is achieved by heat treating the stone. This causes the iro...

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    $8.00 - $8.00
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    Blue Forest Chalcedony Agatized Unpolished Petrified Hardwood Slab | Eden Valley | Wyoming

    In Stone Fossils

    This Rare Petrified agatized wood with chalcedony was collected on private land near Eden Valley in Wyoming. It is unpolished but sealed to protec...

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    Blue Forest Chalcedony Agatized Unpolished Petrified Hardwood Slab | Eden Valley | Wyoming

    In Stone Fossils

    This Rare Petrified agatized wood with chalcedony and a worm hole was collected on private land near Eden Valley in Wyoming. It is unpolished but ...

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    Double Knightia eocaena 100% Natural | Green River Formation

    In Stone Fossils

    Knightia fossil found from our private quarry with beautiful reddish-gold toned iron mineral replacement of which our quarry is prized for. This be...

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    Double Knightia eocaena 100% Natural with Coprolite | Green River Formation

    In Stone Fossils

    Knightia fossil found from our private quarry with beautiful reddish-gold toned iron mineral replacement of which our quarry is prized for. This be...

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    Authentic Dinosaur Bone Slice | Morocco

    In Stone Fossils

    Polished slice of Jurassic Unidentified (most likely from a Sauropod) Dinosaur Bone from Bouarfa, Morocco.  Polished on one single side.  Authentic...

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    Otodus obliquus Shark Tooth in Matrix

    In Stone Fossils

    Specimen is approx 2.5" x 1.5" matrix is approx 4" x 3" Kem Kem Fossil Beds - Morocco Otodus is an extinct genus of mackerel shark which lived from...

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    Coprolite (Fossil Feces) 💩 In Original Matrix | Green River Formation | Wyoming

    In Stone Fossils

    Green River Formation, Wyoming  Found on In Stone Fossils Private Quarry  Eocene - 52.3 Million Years Ago Authentic Coprolite (fossil feces) perhap...

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    Otodus obliquus Shark Tooth in Matrix

    In Stone Fossils

    Specimen is approx 2.5" x 1.75" matrix is approx 4" x 5.25" Kem Kem Fossil Beds - Morocco Otodus is an extinct genus of mackerel shark which lived ...

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    Coprolite (Fossil Feces) 💩 In Original Matrix | Green River Formation | Wyoming

    In Stone Fossils

    Green River Formation, Wyoming  Found on In Stone Fossils Private Quarry  Eocene - 52.3 Million Years Ago Authentic Coprolite (fossil feces) perhap...

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    Coprolite (Fossil Feces) 💩 In Original Matrix | Green River Formation | Wyoming

    In Stone Fossils

    Green River Formation, Wyoming  Found on In Stone Fossils Private Quarry  Eocene - 52.3 Million Years Ago Authentic Coprolite (fossil feces) perhap...

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    Five Knightia eocaena 100% Natural | Green River Formation

    In Stone Fossils

    Knightia fossil found from our private quarry with beautiful reddish-gold toned iron mineral replacement of which our quarry is prized for. This be...

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    Triple Knightia eocaena 100% Natural | Green River Formation

    In Stone Fossils

    Knightia fossil found from our private quarry with beautiful reddish-gold toned iron mineral replacement of which our quarry is prized for. This be...

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    $45.00 - $45.00
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    Utah Dugway Geode | Closed Mine

    In Stone Fossils

    Specimen Measures approx: 2.25" x 2.25" This particular mine is no longer being mined for these geodes. Composed of rhyolite, agate and quartz, the...

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    Utah Dugway Geode | Closed Mine

    In Stone Fossils

    Specimen Measures approx: 2" x 2" This particular mine is no longer being mined for these geodes. Composed of rhyolite, agate and quartz, these bea...

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    Utah Dugway Geode | Closed Mine

    In Stone Fossils

    Specimen Measures approx: 2.5" x 2" This particular mine is no longer being mined for these geodes. Composed of rhyolite, agate and quartz, these b...

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    Pachycephalosaurus Rib Bone | Montana

    In Stone Fossils

    Pachycephalosauridae fossil rib bone from Montana, Hell Creek Formation Custom stand included  Specimen measures approx 15" x 5.5" With stand measu...

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    4.75" Diplomystus dentatus | 100% Natural | Green River Formation | Wyoming

    In Stone Fossils

    Diplomystus unrestored specimen 100% Natural  Eocene (51.98 Million Years Ago)  Green River Formation, Wyoming, USA  In Stone Fossils Private Quarr...

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    5.75" Diplomystus dentatus | 100% Natural | Green River Formation | Wyoming

    In Stone Fossils

    Diplomystus unrestored specimen 100% Natural  Eocene (51.98 Million Years Ago)  Green River Formation, Wyoming, USA  In Stone Fossils Private Quarr...

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    Free Form Blue Forest Chalcedony Agatized Unpolished Petrified Hardwood Slab | Eden Valley | Wyoming

    In Stone Fossils

    This Free Standing Rare Petrified agatized wood with chalcedony was collected on private land near Eden Valley in Wyoming. It is unpolished but se...

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    $995.00 - $995.00
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    Crazy Lace Agate Unpolished Slab | Mexico

    In Stone Fossils

    Unpolished Slab dimensions: 8" x 4.25" at widest, x nearly .5" width Featuring intricate banding patterns and druze pockets. Unpolished but sealed ...

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Newest Items
  • Fossil Preparation Tools See more
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    Prepare Your Own Fossil Fish

    In Stone Fossils

    Our instagram followers love to watch us prepare these specimens, and how satisfying and relaxing it is to remove the matrix away from the fossil. ...

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    Fossil Preparation Air Scribe

    In Stone Fossils

    Prepare your own fossils like the pro's! We've collaborated with Fossil Shack to bring you high quality tools for your fossil preparation needs. Af...

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    Fossil Block - LIMITED RUN Authentic 12" x 12" Fossil Pay Load

    In Stone Fossils

    If you couldn't visit the quarry this year... we'll just SHIP IT TO YOU  Only THIRTEEN available 12" x 12" x 3" (approximate sizes) blocks of Fossi...

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    Starbond Adhesive | Fix Fossil Breaks and Fractures | Quick Drying

    In Stone Fossils

    Need to fix a fossil? Use what we use: Starbond Adhesives. Thick glue to fill gaps and adhere large rock, thin glue to repair fractures and splits,...

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Testimonials

BRILLIANT! AMAZING! amazing too stellar customer service !!! love my ancient fossils!

Thank you In Stone Fossils!

Brianna Uriostegui

Placed online order. Fast shipping, great communication, great price, and best of all great product! Very happy with order! Highly recommend them!

Kevin Pete

Found this site while searching for Green River formation fossils. I bought 25 of what was said to be partial fish. Some of them were very good examples of partial fossil fish but about 10 of them were complete fish and very good quality. Some were a little light in details but still and EXCEPTIONAL VALUE, great customer care and service and fast shipping with well packed fossils. HIGHLY RECOMMENDED.

Phillip Dudziak

I was looking for a unique gift and found the perfect thing at In Stone Fossils. The fossil arrived, just as pictured, packaged beautifully. From purchase on Sunday afternoon, the package arrived on Wednesday! I am very satisfied and am looking forward to doing some more shopping with them!

Holly Pimpinelli

Great little fossil store. Museum quality pieces. Vast price range. Stuff for a couple bucks to $45,000. Did I mention Museum quality?

Joseph Spivey

Love it!! I ordered a spino tooth for my brothers birthday and he was super overhelmed. I got a very sweet handwritten card and even a gift! Super sweet people giving super cool quality fossils! I live in Norway, it literally traveled around the world and the package was still in perfect condition. I can recommend in every way and i will definitely order other things!! ❤️❤️❤️

Zsófia Márton

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