Chert (with Fossiliferous Silicification)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Category
Fossil
Browse fossil specimens identified by the Rock Identifier community.
Amber
Succinite (fossilized organic resin)
mineral
Limestone (specifically Fossiliferous or Crinoidal Limestone)
Calcium Carbonate (CaCO3) - Calcite Rock
sedimentary
Amber
Succinite (fossilized resin); C10H16O
mineraloid
Amber
Succinite (Fossilized Resin C10H16O)
Organic Mineraloid
Sandstone
Clastic sedimentary rock (SiO2 primary)
sedimentary
Chert (containing small fossils)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Crinoid Fossil Marble
Crinoidal Limestone / Phylum Echinodermata
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Chert (Field Pebble)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO₂ - Silicon Dioxide)
metamorphic
Anthracite Coal
Anthracite (Carbon-based solid)
metamorphic
Ironstone Concretion
Siderite or Ferruginous Concretion (FeCO3 or Iron Oxides)
sedimentary
Limestone
Limestone (Calcium Carbonate - CaCO3)
sedimentary
Limestone (with potential fossil inclusions)
Calcium Carbonate (CaCO3)
sedimentary
Chert (containing fossil leaf impression)
Microcrystalline silicon dioxide (SiO2)
sedimentary
Ferruginous Sandstone (with ripple marks)
Arenite with Iron-Oxide (Fe2O3) cement
sedimentary
Siltstone or Fine-grained Sandstone pebble
Siltstone (primarily SiO2 with clay minerals)
sedimentary
Chert Nodule (Fossiliferous Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Limonite Concretion
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
sedimentary
Petrified Wood (Agatized/Silicified Wood)
Silicified Wood (SiO2)
metamorphic
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Sandstone (with ripple marks)
Arenite (SiO2 primarily)
sedimentary
Petrified Wood (Silicified Wood)
Silicified Paleoflora (mainly Quartz, SiO2)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Fossiliferous Limestone (Coquina)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (primarily SiO2 with iron oxide cementation)
sedimentary
Sandstone (with Iron Staining)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Ferruginous Sandstone (Ironstone)
Ferruginous Sandstone / Limonite-cemented Quartz Sandstone
sedimentary
Limestone with Weathering Rind
Calcium Carbonate (CaCO3) - Bioclastic or Micritic Limestone
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossil Coral (Favosites)
Favosites (Order: Tabulata, Phylum: Cnidaria)
sedimentary
Chert (Hagstone/Adder Stone)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Banded Chert
Silicon Dioxide (SiO2)
sedimentary
Banded Chert
Silicon Dioxide (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Brown Quartz (Jasper or Chert)
Silicon Dioxide (SiO2)
sedimentary