Bivalves
bivalves — pre-owned
Browse 318 bivalves — pre-owned on eBay — listings updated every few minutes. All items are pre-owned and sold by eBay sellers directly.
Agatized Fossil Clams - Morocco - 1 Per Purchase
A single Agatized Fossil Clam from Morocco. Locality: Morocco.
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Large FOSSIL CHESAPECTEN SCALLOP 5" Seashell BEAUTIFUL Coloring Megalodon Era!
I dug these up myself! Coastal VA. No two are alike. It is a wonderful piece of history!Estimated 4-5 million years old This product is a GIANT 5" Fossil Chesapecon Scallop Seashell, originating from the United States. The shell is in beautiful condition and would make a unique and impressive addition to any collection of rocks, fossils, and minerals. This bivalve mollusk fossil is a rare and unique find for collectors interested in the history and beauty of seashells. D
Fossilized Oyster From Hollister California (Crassostrea Titan)
This is a beautiful specimen of the Titan Oyster measuring 12” long and weighing in at a whopping 8 lbs, this was found many decades ago in Hollister, California. These massive Miocene-era oysters, approximately 10 million years old, can reach over 21 cm (8 inches) in length, highlighting that the area was once an ancient seabed. They are commonly found in sandstone, often preserved with distinct ribbing and heavy shell structure.
FULL Exogyra Oyster Fossil - Cretaceous - TX – 1.409kg / 5.2in - Devil's Toenail
This is a full oyster fossil! Very different than most the Exogyra specimen on eBay. Sealed shut for ~100 million years. For display or to open and chance finding an ancient pearl. Measuring 5.17in (131.32mm) and 1.409kg (3.106lbs)!!!!!!! this fossil is of the largest on Ebay at over 5inches and 3lbs!! Found in Travis County in Central Texas. Fossil, from the Cretaceous Period, is up to 120 million years old. A unique addition to any collection of rocks, fossils, and minerals.
Fossil Oyster from Niobrara Formation, Western Kansas
3 Large Scallop Fossils Chesapecten Jeffersonius Pliocene - York River Virginia
The product is a set of three large scallop fossils belonging to the Chesapecten jeffersonius species, found in the Pliocene deposits along the York River in Virginia, United States.
Ruck's Pit Calcite Clam Fossil - Mercenaria permagna - Ft. Drum, Florida
A Ruck's Pit Calcite Crystal Clam from Fort Drum, Florida. These are the only place in the world in which these specific Calcite Clams are from, and represent a Pleistocene Lake Okeechobee! Formation: Ruck's Pit.
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Ruck's Pit Calcite Clam Fossil - Mercenaria permagna - Ft. Drum, Florida
A Ruck's Pit Calcite Crystal Clam from Fort Drum, Florida. These are the only place in the world in which these specific Calcite Clams are from, and represent a Pleistocene Lake Okeechobee! Formation: Ruck's Pit.
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Fossil Scallop Seashell Megalodon Era ~ Great Condition
This fossil bivalve is highly sought after by collectors and enthusiasts of marine fossils. Great condition, see photos.
Ruck's Pit Calcite Clam Fossil - Mercenaria permagna - Ft. Drum, Florida
A Ruck's Pit Calcite Crystal Clam from Fort Drum, Florida. These are the only place in the world in which these specific Calcite Clams are from, and represent a Pleistocene Lake Okeechobee! Formation: Ruck's Pit.
Ruck's Pit Calcite Clam Fossil - Mercenaria permagna - Ft. Drum, Florida
A Ruck's Pit Calcite Crystal Clam from Fort Drum, Florida. These are the only place in the world in which these specific Calcite Clams are from, and represent a Pleistocene Lake Okeechobee! Formation: Ruck's Pit.
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Ruck's Pit Calcite Clam Fossil - Mercenaria permagna - Ft. Drum, Florida
A Ruck's Pit Calcite Crystal Clam from Fort Drum, Florida. These are the only place in the world in which these specific Calcite Clams are from, and represent a Pleistocene Lake Okeechobee! Formation: Ruck's Pit.
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Clam Sea Shell Fossil Imprint San Luis Obispo
I found this in 1980 in the hills of San Luis Obispo.
FULL Exogyra Oyster Fossil - Cretaceous - TX – 1.14kg / 5.3in - Devil's Toenail
This is a full oyster fossil! Very different than most the Exogyra specimen on eBay. Sealed shut for ~100 million years. For display or to open and chance finding an ancient pearl. Measuring 5.32in (135.13mm) and 1.137kg (2.507lb)!!!!!!! this fossil is of the largest on Ebay at over 5inches and 2.5lbs!! Found in Travis County in Central Texas. Fossil, from the Cretaceous Period, is up to 120 million years old. A unique addition to any collection of rocks, fossils, and minerals.
Exogyra Oyster Fossil - Cretaceous - TX – XXL - 1.78kg / 6.7in - Devil's Toenail
Measuring 6.74in (171.2mm) and 1.783kg (3.931lbs)!!!!!!! One of the largest on Ebay at nearly 7 inches and 4lbs!! Found in Travis County in Central Texas. Fossil, from the Cretaceous Period, is up to 120 million years old. A unique addition to any collection of rocks, fossils, and minerals.
Fossilized Oyster Bivalve – Intact Valves w/ Matrix – Chesapeake Bay Area
✔️ Intact bivalve form (both valves present). While fossil oyster shells are common in the Chesapeake region, intact examples with both valves present and matrix attached are less commonly encountered than single loose valves.
Fossil MUSCLE on GASTROPOD from Payson Arizona
Fossil Muscle is sitting on top of a Gastropod. I cant make out what type cause the muscle is on top of it, but you can see in the pictures. The fossil Muscle is quite scarce. I was only able to find 2 and that was 33 years ago.
Ruck's Pit Calcite Clam Fossil - Mercenaria permagna - Ft. Drum, Florida
A Ruck's Pit Calcite Crystal Clam from Fort Drum, Florida. These are the only place in the world in which these specific Calcite Clams are from, and represent a Pleistocene Lake Okeechobee! Formation: Ruck's Pit.
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Rucks Pit Fort Drum FL, Fossilized Clam, Mercenaria Permagna, Calcite Crystals
The product is a rare and well-preserved fossilized clam, specifically a Mercenaria Permagna, with intricate calcite crystals. This unique piece is a valuable collectible for enthusiasts of rocks, fossils, and minerals, particularly those interested in mollusks and bivalves. Rucks Pit, known for its rich fossil deposits, is likely the source of this remarkable find, making it a prized addition to any collection of natural history artifacts.
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Vintage Fossil Shell Imprint in Stone | Natural Bivalve External Mold Specimen
The product is a vintage fossil shell imprint in stone, specifically a bivalve external mold specimen. This unique item was created in the United States, making it a rare and collectible piece for enthusiasts of rocks, fossils, and minerals. The intricate detailing of the shell imprint adds to its appeal as a natural and historical artifact, perfect for display or further study.
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Ruck's Pit Calcite Clam Fossil - Mercenaria permagna - Ft. Drum, Florida
A Ruck's Pit Calcite Crystal Clam from Fort Drum, Florida. These are the only place in the world in which these specific Calcite Clams are from, and represent a Pleistocene Lake Okeechobee! Formation: Ruck's Pit.
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Fossil Bivalve Shells from Denton Clay Formation Denton Texas
One Rock with Three Fossil Bivalve Shells. You get the fossil(s) shown.
Clam Fossil Specimen from Texas, Very Old Nice Textures - 6 oz, 2.5"
Ruck's Pit Calcite Bivalve Fossil - Mercenaria permagna - Ft Drum, Florida
A Ruck's Pit Calcite Encrusted Shell from Fort Drum, Florida. Formation: Ruck's Pit. Locality: Fort Drum, Florida.
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Ruck's Pit Calcite Clam Fossil - Mercenaria permagna - Ft. Drum, Florida
A Ruck's Pit Calcite Crystal Clam from Fort Drum, Florida. These are the only place in the world in which these specific Calcite Clams are from, and represent a Pleistocene Lake Okeechobee! Formation: Ruck's Pit.
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2X Cephalopod Fossils In One Piece Nearly 2 Pounds
2X Cephalopod Fossils In One Piece Nearly 2 Pounds. Unfortunately I don't know much about these or their origin. Please look at the pictures to determine the condition for yourself.
Ruck's Pit Calcite Clam Fossil - Mercenaria permagna - Ft. Drum, Florida
A Ruck's Pit Calcite Crystal Clam from Fort Drum, Florida. These are the only place in the world in which these specific Calcite Clams are from, and represent a Pleistocene Lake Okeechobee! Formation: Ruck's Pit.
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Ruck's Pit Calcite Clam Fossil - Mercenaria permagna - Ft. Drum, Florida
A Ruck's Pit Calcite Crystal Clam from Fort Drum, Florida. These are the only place in the world in which these specific Calcite Clams are from, and represent a Pleistocene Lake Okeechobee! Formation: Ruck's Pit.
You save $2.50
Fossilized Oyster Bivalve – Intact Valves w/ Matrix – Chesapeake Bay Area
✔️ Intact bivalve form (both valves present). While fossil oyster shells are common in the Chesapeake region, intact examples with both valves present and matrix attached are less commonly encountered than single loose valves.
RARE ENCRUSTED FOSSIL 4” Fossil Chesepectan Scallop Seashell VA megalodon era
This product is a very rare fossil scallop with a fossilized specimen inside. Impressive 4" Chesapeakepecten Scallop seashell from the Megalodon era. This fossil is truely unique, it’s very rare to have an encrusted fossil within a fossil scallop, this one in particular could be a pearl like growth that connected over time or a small tube work that connected after this fossils death. The intricate details of this piece make it a standout addition to any collection of fossils. Great for collectors! Fast free shipping! Don’t miss out on such a unique find! B21
Ruck's Pit Calcite Clam Fossil - Mercenaria permagna - Ft. Drum, Florida
A Ruck's Pit Calcite Crystal Clam from Fort Drum, Florida. These are the only place in the world in which these specific Calcite Clams are from, and represent a Pleistocene Lake Okeechobee! Formation: Ruck's Pit.
You save $9.00
Bivalve Clam Steinkern Fossil Turtle Head Cucullaea Recendens False Ark Shell
Bivalve Fossil Palaeoneilo magnifica Bolivia Devonian
Species: Palaeoneilo magnifica, Clarke (1913). Bivalve is fossilized as internal mold (positive). Long: 24 mm.
Ruck's Pit Calcite Clam Fossil - Mercenaria permagna - Ft. Drum, Florida
A Ruck's Pit Calcite Crystal Clam from Fort Drum, Florida. These are the only place in the world in which these specific Calcite Clams are from, and represent a Pleistocene Lake Okeechobee! Formation: Ruck's Pit.
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Florida Fossil Shell Bivalve Hyotissa sp. BIG 4” Pliocene Age Oyster
Florida Fossil Bivalve Hyotissa sp. BIG 3.95” Pliocene Age Oyster Shell.
LARGE 100 Carat Opalized Fossil Clam Shells In Matrix! All Natural! Nice Color!
This is a nice 100ct section of natural opalized shells in a rock matrix. It is in excellent condition. You can trust this source and feel confident in knowing exactly what you are purchasing. We strive to bring you the most genuine and rare collectibles in the world.
GIANT 8.5” FOSSIL CHESAPECTEN SCALLOP Seashell VA megalodon era, GREAT CONDITION
This product is a very rare and impressive 8.5" Chesapeakepecten Scallop seashell from the Megalodon era. This fossil bivalve is highly sought after by collectors and enthusiasts of marine fossils. The intricate details and size of this piece make it a standout addition to any collection of mollusk fossils. Great for collectors, beach houses, perfect for all fossil enjoyers! This is the largest fossil scallop I have ever found! Definitely museum quality, a specimen of this size in this condition is near an impossibility. Fast Free Shipping! B12
Mortality Plate 6.8" Fossil Pectens seashells California COA 6698
Here is a very nice fossil containing multiple fossil seashells, species Pecten, from Southern California. Probably Miocene. There are pectens on the front side and one pecten on the back. 6698 Pectenbox2.
LARGE 5.9” FOSSIL CHESAPECTEN SCALLOP Seashell VA megalodon era, GREAT CONDITION
This product is a very rare and impressive 5.9" Chesapeakepecten Scallop seashell from the Megalodon era. This fossil bivalve is highly sought after by collectors and enthusiasts of marine fossils. The intricate details and size of this piece make it a standout addition to any collection of mollusk fossils. Great for collectors, beach houses, perfect for use as a display. Fast free shipping! B13
Florida Spiny Jewel Box Shell (Arcinella Cornuta) Bivalve Shell 1.5" Pre-loved
The Florida Spiny Jewel Box Shell (Arcinella Cornuta) is a beautiful and unique bivalve shell that measures approximately 1.5 inches in size. This pre-loved shell is a collectible item that can be used as a decorative piece or displayed in a shell collection. Its intricate design and vibrant colors make it a standout piece for any seaside enthusiast or collector of shells. This item is pre-loved. Refer to photos for details and if any questions please feel free to contact me Measurements prior to packaging 1.5" x 1.25" x 0.5" Weight 0.2 ozs Thanks for taking a peek and have a blessed day