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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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Russian Cave Lion (Panthera spelaea) Skull | Russia

Russian Cave Lion (Panthera spelaea) Skull | Russia

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    Pyrite Sun

    In Stone Fossils

    Measures approximately 3.5″ in diameter.   Pyrite Suns, also called Pyrite Dollars, Sun Dollars or Miners Dollars, are found in the coal mines of S...

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    Pyrite Sun

    In Stone Fossils

    Measures approximately 4″ in diameter.   Pyrite Suns, also called Pyrite Dollars, Sun Dollars or Miners Dollars, are found in the coal mines of Spa...

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    Fluorescent Wyoming Youngite Agate Slice | Guernsey, Wyoming

    In Stone Fossils

    Stunning Fluorescent Wyoming Youngite Agate Slice, Hartville Uplift Guernsey, Wyoming from a now closed cave Specimen approx. size: 5" x 5" x 0.25"...

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    Fluorescent Wyoming Youngite Agate Slice | Guernsey, Wyoming

    In Stone Fossils

    Stunning Fluorescent Wyoming Youngite Agate Slice, Hartville Uplift Guernsey, Wyoming from a now closed cave Specimen approx. size: 5" x 4.5" x 0.2...

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    Fluorescent Wyoming Youngite Agate Slice | Guernsey, Wyoming

    In Stone Fossils

    Stunning Fluorescent Wyoming Youngite Agate Slice, Hartville Uplift Guernsey, Wyoming from a now closed cave Specimen approx. size: 5" x 4.75" x 0....

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    Palm Flower | Green River Formation | Wyoming

    In Stone Fossils

    This is a beautiful palm flower of the family Arecaceae with great preservation. Specimen approx. size: 1cm x 1cm Matrix approx. size: 2.75" x 2.25...

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    Palm Flower | Green River Formation | Wyoming

    In Stone Fossils

    This is a beautiful palm flower of the family Arecaceae with great preservation. Specimen approx. size: 1cm x 1cm Matrix approx. size: 2.5" x 2.5" ...

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    Pyrite Sun

    In Stone Fossils

    Measures approximately 4.25" x 3.5"   Pyrite Suns, also called Pyrite Dollars, Sun Dollars or Miners Dollars, are found in the coal mines of Sparta...

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    Phareodus testis | Zero Restoration | Green River Formation

    In Stone Fossils

    Phareodus testis, unrestored specimen, 100% Natural  Eocene (52.3 Million Years Ago)  Green River Formation, Wyoming, USA In Stone Fossils Private...

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    Phareodus testis | Zero Restoration | Green River Formation

    In Stone Fossils

    Phareodus testis, unrestored specimen, 100% Natural  Eocene (52.3 Million Years Ago)  Green River Formation, Wyoming, USA In Stone Fossils Private...

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    3" Knightia eocaena 100% Natural | Green River Formation | Wyoming

    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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    6.5" 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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    6.25" 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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    6.75" 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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    3.5" Knightia eocaena 100% Natural | Green River Formation | Wyoming

    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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    Fluorite Double Terminated Wand Necklace

    In Stone Fossils

    This gorgeous anti stress Natural Fluorite Double Terminated Wand necklace has gorgeous colors all throughout with deep purples and teals shining t...

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    Mioplosus labracoides | Green River Formation | Wyoming

    In Stone Fossils

    Mioplosus labracoides  Eocene (52.3 Million Years Ago)  Green River Formation, Wyoming, USA  In Stone Fossils Private Quarry  Mioplosus labracoi...

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    Undescribed Monocot flower | Green River Formation

    In Stone Fossils

    This is a beautiful, undescribed Monocot flower, possibly of the family Amaryllidaceae with great preservation  Specimen measures approx 3cm x 3.5c...

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    Authentic Dinosaur Coprolite Slice 💩 | Unpolished

    In Stone Fossils

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

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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 has a natural unpolished matte fin...

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    Gorgeous Argentinian Blue Calcite Palm Stone | Argentina

    In Stone Fossils

    Gorgeous Argentinian Blue Calcite Palm Stone with beautiful coloring. Some areas are see through not because of thinness but because of the stunnin...

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    Whole Madagascan Ammonite

    In Stone Fossils

    Whole Ammonite from Madagascar with oak-leaf shaped sutures throughout.  Approximately 5.5" diameter at the longest point.  Weight: 1lb  Ammonoids ...

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    Pyritized Ammonite

    In Stone Fossils

    Species : Quenstedtoceras lamberti  Age: Middle Jurassic (174.1 - 163.5 Million Years Ago)  Location: Dubki Clay Quarry, Volga River Basin, Sara...

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    Pyritized Ammonite

    In Stone Fossils

    Species : Quenstedtoceras lamberti  Age: Middle Jurassic (174.1 - 163.5 Million Years Ago)  Location: Dubki Clay Quarry, Volga River Basin, Sar...

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    2.5" 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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Newest Items
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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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