Red Sandstone
Sandstone (lithic arenite or arkose with iron oxide)
sedimentary
Category
Anthropogenic (Man Made Material Mimicking Sedimentary Rock)
Browse anthropogenic (man made material mimicking sedimentary rock) specimens identified by the Rock Identifier community.
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Chert
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
fossil
Sandstone (Quartzose Sandstone)
Arenite (SiO2 based)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Sandstone (lithified arenite/wacke)
Sedimentary Rock
Coal (Bituminous / Anthracite)
Carbonaceous Sedimentary Rock (C)
sedimentary
River Pebble (Greywacke / Basalt Pebble)
Indeterminate Rounded Pebble (composed of quartz, feldspar, or mafic minerals)
sedimentary
Seashell Fragment
Calcium Carbonate (CaCO3) in the form of Aragonite or Calcite
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Pebble / Cobble)
Arenite / Sedimentary Rock (composed of quartz and feldspar)
sedimentary
Conglomerate
Conglomerate (SiO2, Al2O3, Fe2O3, CaCo3)
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock, primarily SiO2)
sedimentary
Ferruginous Sandstone
Arenite with Iron-Oxide cement (Fe2O3 · nH2O)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
sedimentary
Sandstone
Arenite (compositionally various, primarily SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2)
sedimentary
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3)
sedimentary
Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Sandstone
Sedimentary Rock (Quartz Arenite)
sedimentary
Sandstone
Quartz Arenite / Sedimentary Rock
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Likely chert or flint
Microcrystalline quartz (SiO₂), commonly called chert; exact identification requires testing
sedimentary
Jasper
Silicon Dioxide (SiO2) microcrystalline quartz
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Fossilized Nut / Coprolite / Concretion
Trace Fossil / Permineralized Plant Material
fossil
Jasper and Quartz Breccia
Silica breccia (SiO2)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Quartz Pebble (with Hematite/Feldspar Inclusions)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Pebble)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Conglomerate (Pebble Conglomerate)
Conglomerate
sedimentary
Fossilized Shark Tooth
Chondrichthyes (Class) fossilized tooth
fossil
Jasper with Quartz Veining
Microcrystalline quartz (SiO2) with iron oxide impurities
sedimentary
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Likely weathered quartz-rich stone or fossil fragment
Indeterminate; possibly quartz-bearing sandstone, iron-stained quartz, or a fragmentary fossil
mineral
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary