Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Category
Sedimentary (Artificial)
Browse sedimentary (artificial) specimens identified by the Rock Identifier community.
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Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Sandstone (with potential Concretion or Fossil fragment)
Arenite (primarily SiO2)
sedimentary
Chert (and Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Quartz/SiO2)
mineral
Sandstone (Quartzite Pebble)
Arenite (primarily SiO2)
sedimentary
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Conglomerate
Conglomerate (SiO2 matrix with various inclusions)
sedimentary
Jasper Pendant
Silicon dioxide (SiO2) with impurities
Mineral/Sedimentary
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Ammonite Fossil
Ammonitida (Extinct subclass of Cephalopoda)
sedimentary
Chert (Jasper/Flint variety)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Jasper/River Stone)
Silicon dioxide (SiO2) - Microcrystalline quartz
sedimentary
Sandstone (with Liesegang rings or Oxidation)
Arenite (primarily Quartz SiO2 with Iron Oxide Fe2O3 staining)
sedimentary
Red Siltstone
Siltstone (primarily quartz and feldspar sized 0.0039 to 0.0625 mm)
sedimentary
Fossil Shell (Bivalve)
Phylum Mollusca, Class Bivalvia (typically composed of Calcium Carbonate / CaCO3)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Coprolite
Fossilized feces (various taxa)
sedimentary
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Gastropod Fossil
Phylum Mollusca, Class Gastropoda (Calcium Carbonate, CaCO3)
sedimentary
Chert (Yellow/Tan)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Concretion in Shale
Siltstone/Shale with Siderite or Calcareous concretions
sedimentary
Chert (specifically Flint or Dark Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Chert (Microcrystalline or cryptocrystalline Quartz, SiO2)
sedimentary
Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite and Sandstone Pebbles
Silicon dioxide (SiO2)
metamorphic and sedimentary
Sandstone / Chert Gravel
SiO2 (Silicon Dioxide based clastic sedimentary rock)
sedimentary
Ferruginous Sandstone
Clastic Sedimentary Rock (Sandstone with Iron Oxide cement)
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (SiO2 with Fe2O3/FeO oxides)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Calcite on Limestone
Calcium Carbonate (CaCO3)
mineral
Weathered iron-rich sandstone or conglomeratic sedimentary cobble
Ferruginous sandstone, possibly polymictic conglomerate
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (likely Arkosic or Quartzose)
Arenite (SiO2 based with mineral inclusions)
sedimentary
Sandstone (likely Graywacke or Arkosic varieties)
Arenite (composed primarily of SiO2)
sedimentary