Fossil Bivalve Shell
Class Bivalvia (e.g., Veneriidae family)
sedimentary
Category
Mineralized Fossil
Browse mineralized fossil specimens identified by the Rock Identifier community.
Learn about Mineralized Fossil in the encyclopedia
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Bivalve Fossil (Clam)
Class Bivalvia (Calcium Carbonate, CaCO3)
sedimentary
Brain Coral Fossil
Family Mussidae or Merulinidae (Order Scleractinia)
sedimentary
Crinoid Fossil in Limestone
Crinoid (Class Crinoidea) in Fossiliferous Limestone (CaCO3)
sedimentary
Crinoid Fossil in Chert
Crinoid (Class Crinoidea) in Microcrystalline Quartz (SiO2)
sedimentary
Calamites (Fossil Plant)
Calamites (Genus), belonging to the class Equisetopsida
sedimentary
Honeycomb Coral Fossil
Favosites (extinct genus of tabulate coral)
sedimentary
Horn Coral Fossil
Rugosa (extinct order of solitary corals)
sedimentary
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with iron oxide cement Fe2O3)
sedimentary
Red Sandstone
Arenite (with Iron Oxide cement)
sedimentary
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Chert (specifically Gray/Blue Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Glauconitic Sandstone (Greensand pebble)
Glauconitic Quartz Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)
sedimentary
Chert (variously known as Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
sedimentary
Black Limestone with Calcite Veining
Bituminous Limestone (CaCO3 with Organic Carbon inclusions)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclastic Inclusions
sedimentary
Dinosaur Skull Fossil (Velociraptor Replica)
Velociraptor mongoliensis fossil specimen in sedimentary matrix
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Petrified Wood (Silicified Wood)
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
mineral
Chalcedony (specifically Agate or Common Opal variety)
Cryptocrystalline Silica (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Quartzite with Vugs
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinates (Fossilized Tree Resin)
mineraloid
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone Beach Pebble
Clastic Sandstone (SiO2 - Quartz-dominant)
sedimentary
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
River Rocks (Basalt and Sedimentary Stones)
Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock
igneous and sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Sandstone
Arenite (SiO2 principal component)
sedimentary
Kambaba Jasper
Stromatolite (Microbial mat fossil in silicified sediment)
sedimentary
Stromatolite
Biogenic Sedimentary Rock (Precambrian Stromatolite fossil)
sedimentary
Fossilized Brachiopod/Bivalve in Limestone
Brachiopoda or Bivalvia fossil in Calcite/Limestone (CaCO3)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary