Fossil 'Alien' Rastellum and Clam Bivalve Group

Cretaceous and Miocene Periods, 145-5 million years BP. Group comprising polished Cretaceous Rastellum sp. oyster, often called 'Fossil Aliens' and Miocene Mercenaria sp. clam bivalve shells. 275 gram

Cretaceous Period, 120 million years B.P. A polished Rastellum bivalve, also known as ‘fossil aliens’ due to their unique shape. 134 grams, 71 mm (2 3/4 in.). From the Marovoay, Mahajanga district

Thousand Planet Auction House Treasure Auction Day, all major kinds of Mineral, you will find in today's auctions. Join us and add our auction into your calendar. Today auction including Artifacts, Mi

A group of fourteen (14) assorted preserved seashell and clam fossils of unidentified species. Provenance: The private collection of Gustave Nelson, Cheshire MA. Measurements are for largest piece.

Pleistocene Period, 2.6 million years-11,700 years B.P. A group of 100 mixed historic fossils comprising mostly bivalves and small pieces of coral. 2 kg total, 21-50 mm (3/4 - 2 in.). Gregory & Bottle

Cretaceous Period, 130-60 million years BP. A group of marine fossils comprising: a large ammonite in matrix; a pair of gastropods in matrix; a matrix containing several small bivalves; three very lar

Carboniferous-Cretaceous Period, 359-66 million years BP. A group of six fossils of different cllasses and periods, including four bivalves, a goniatite, and an ammonite, five in old white card trays

Africa, Madagascar, ancient seas, ca. 400 million years ago. A tall group of ammonites and other ancient shells fossilized in a hardened grey matrix. The ammonites range in color from a rich reddish b

13" x 10" Clam/bivalve, Pierre Shale, near Rapid City SD

Sphere Fossil Clam Shells Silurian

6 cut and polished ammonite halves to visualize chambers, on cards, 1.5 x 1.25 x 0.25" to 1.25 x 1.0 x 0.25"; 1 entire with label identifying as Hoploscaphite from Fox Hills formation, South Dakota, o

impressive natural form fossil group with 7 polished ammonite specimens in stone matrix slab. 17" high, 24" wide, 2 3/4" deep. Property of a Westport, CT Collector.

Huge Paradoxides trilobite in matrix, trilobites are well known fossil group of extinct marine arthropods that from the class trilobita. Diameter: height- 20 inches width- 18 1/2 inches

Jurassic Period, circa 200 million years B.P. Promicroceras planicosta with iron stained surface giving a beautiful contrast in colour, from the Lower Lias, Obtusum Zone. 42.53 grams, 67 mm (2 3/5 in.

1 1/2in(3.8cm) X 20in(50.8cm) X 10 3/4in(27.3)

1 3/4in(33.6cm) X 20in(50.8/cm) X

Jurassic Period, 199-145 million years B.P.. A group of ten discoid fossil vertebra from Brachypterigius sp.; accompanied by an identification label reading 'rare Ichthyosaur vertebra, Kimmeridgian. 1

Eocene Period, 56-33 million years BP. A group of two Knightia alta fossil fish on a rectangular matrix. 859 grams, 19cm (7 1/2"). From the Pradi collection, Boston, USA; acquired during 1980s; from t

Museum Quality Fossil Gastropod, Bi-valve, and Coral Shell Fossil Sphere Tethys Sea, Pakistan Triassic

comprising 41 lithographs in color; each signed, dated, and numbered (various numbers out of an edition of 350); loose (no cover) each 39 1/2 x 27 1/2 inches

Silvered Bronze Clam Shell & Crab Group. Condition: good with no damage. Ht. 4 1/2" W. 9" D. 4"

Approx. 6.5" W, 5.5" from opening to hinge, 2.5" thick, smaller one approx. 2.5" x 1.5" x .75"

Antique Fossil of a Clam, 6" x 5"

A group of thirteen mineral specimens, including one jointed twin geode, one septarian nodule from Utah with a yellow calcite centre, brown aragonite or siderite lines, and limestone encasing, one Ger