Shale with Iron Staining
Fissile Argillaceous Sedimentary Rock
sedimentary
Category
Mineralized Fossil
Browse mineralized fossil specimens identified by the Rock Identifier community.
Learn about Mineralized Fossil in the encyclopedia
View all →
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Sandstone
Arenite (Sedimentary Rock)
sedimentary
Fossil Coral
Hexagonaria (Rugose coral) / Rugosa
fossil
Sandstone
Arenite (SiO2 based with mineral cements)
sedimentary
Limestone with Fossil Fragment
Sedimentary carbonate rock (CaCO3)
sedimentary
Pitted Limestone with Honeycomb Weathering
Karst-weathered fossiliferous limestone (CaCO3)
sedimentary
Sandstone Concretion
Septarian Concretion (Nodule)
sedimentary
Manganese-coated Sandstone
Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)
sedimentary
Coral Skeleton (Scleractinia)
Aragonite (CaCO3) biomineralisation within Anthozoa
fossil
Sandstone Cobble
Arenite (primarily Quartz Arenite)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily Quartz)
sedimentary
Fossil Coral
Rugosa or Tabulata coral fossil
fossil
Bivalve Fossil (Clam)
Class Bivalvia (Mollusca)
fossil
Fossilized bivalve shell
Bivalvia indeterminate; likely a fossil cockle or clam shell, aragonite/calcite replaced or preserved
fossil
Sandstone
Arenite (Sandstone)
sedimentary
Ironstone Concretion
Ferruginous Siltstone/Ironstone (Fe2O3)
sedimentary
Ironstone Concretion (Iron-rich Mudstone)
Siderite / Geothite concretion (FeCO3 / FeO(OH))
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Limestone with Calcite Veining
Calcium Carbonate (CaCO3)
sedimentary
Amber
Succiniferous fossil resin (C10H16O)
gemstone
Orthoceras Fossil
Orthoceras sp. (Extinct genus of nautiloid cephalopod)
fossil
Red Sandstone
Sandstone (principally Quartz with Iron Oxide coating)
sedimentary
Crinoid Fossil in Chert
Siliceous limestone with Crinoidea fossil (SiO2)
sedimentary
Agatized fossil fragment, possibly silicified coral
Chalcedony (microcrystalline SiO₂) replacing carbonate fossil material
fossil
Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)
Gneiss (complex silicate composition)
metamorphic
Calamites (Fossil)
Calamites sp. (Tracheophyta, Equisetopsida)
sedimentary
Ironstone Concretion
Siderite or Hematite-rich Concretion (FeCO3 / Fe2O3)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (with iron oxide cement, Fe2O3)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Sandstone with Concretions / Liesegang Rings
Arenite with iron oxide banding
sedimentary
Fossil Coral
Rugosa or Tabulata / Hexacorallia (replaced with silica or calcite)
fossil
Sandstone (lithic/quartz variant)
Clastic sedimentary rock (SiO2 predominant)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Triceratops Fossil
Triceratops horridus
fossil
Petrified Wood
Siliconized Wood (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary