Brachiopod Fossil in Shale
Phylum Brachiopoda (often species of Order Spiriferida or Rhynchonellida)
sedimentary
Category
Mineralized Fossil
Browse mineralized fossil specimens identified by the Rock Identifier community.
Learn about Mineralized Fossil in the encyclopedia
View all →
Geode (unopened)
Chert / Chalcedony Geode (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Paleoxylon (SiO2)
fossil
Weathered fossiliferous limestone fragment, possibly fossil coral or shell material
Indeterminate carbonate fossil in calcitic limestone; likely composed mainly of calcite (CaCO₃), but species identification is not possible from this image alone
fossil
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 oxides)
sedimentary
Fossil Coral
Hexagonaria or Rugose Coral (petoskey stone / fossilized rugose or tabulate coral)
fossil
Fossiliferous Limestone
Biogenic Limestone (CaCO3)
sedimentary
Fossiliferous Chert (with Fossil Shells)
Silicon Dioxide (SiO2) with biogenic inclusions
sedimentary
Fossiliferous Limestone
Limestone (Calcium Carbonate, CaCO3)
sedimentary
Larimar and Fossil Coral
Pectolite (NaCa2Si3O8(OH)) and Hexagonaria/Petoskey Stone
mineral and sedimentary
Sandstone Pebbles
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Sandstone
Arenite
sedimentary
Petrified Wood
Silicified Wood (primarily Chalcedony or Quartz, SiO2)
sedimentary
Fossilized Shark Teeth
Otodus sp. (Eocene Sand Tiger/Mackerel Shark)
fossil
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Iron Oxide cement)
sedimentary
Sandstone (Quartz-rich)
Arenite
sedimentary
Limestone
Sedimentary Calcite (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 dominated sandstone)
sedimentary
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Iron Concretion
Ferruginous concretion (Fe2O3·nH2O / FeO(OH))
sedimentary
Amber
Succiniferous fossil resin (C10H16O)
fossil
Fossiliferous Shale or Slate with Plant Fossils
Fossil-bearing argillaceous rock
Sedimentary/Metamorphic
Fossiliferous Limestone
Limestone with fossil inclusions (CaCO3)
sedimentary
Kambaba Jasper
Rhyolite (with Stromatolite fossil inclusions)
sedimentary
Amber (specifically Burmese Amber or Burmite)
Succiniferous fossil resin (C10H16O)
mineraloid
Aggregate Concrete
Anthropogenic Conglomerate (Technosol)
sedimentary
Coral Fossil (Favosites)
Favosites (order Tabulata)
fossil
Sandstone
Arenite (SiO2 based typically)
sedimentary
Fossil Coral
Hexagonaria or similar rugose/tabulate coral fossil (Calcium Carbonate, CaCO3)
fossil
Fossilized Shell Fragment / Mother of Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite biomineral
fossil
Fossilized Coral (Petoskey Stone / Favosites)
Hexagonaria percarinata / Favosites sp. (Calcite, CaCO3)
fossil
Amber
Succinate (Fossilized Tree Resin)
fossil
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone (Quartzite-rich)
Clastic sedimentary rock (SiO2 primarily)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (primarily Quartz-rich)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite
sedimentary