Sandstone
Arenite (primarily SiO2)
sedimentary
Category
Sedimentary Rock
Browse sedimentary rock specimens identified by the Rock Identifier community.
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Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide mixture)
mineral
Conglomerate
Clastic Sedimentary Conglomerate (SiO2, CaCO3 dominant)
sedimentary
River Stone (composed of Siltstone/Basalt mixture)
Siltstone or microcrystalline Basalt pebble
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Ferruginous Sandstone
Arenite with Hematite/Limonite cement
sedimentary
Coquina or Coral Fossil
Biogenic Limestone (Calcite/Aragonite)
sedimentary
Red Jasper
Silicon dioxide (SiO2) with iron inclusions
sedimentary
Jasper with Quartz inclusions
Silicon Dioxide (SiO2) with impurities
sedimentary
Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Opaque cryptocrystalline variety of Quartz
sedimentary
Red Jasper
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) - Impure Cryptocrystalline Quartz
sedimentary
Jasper (Yellow/Brown variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Common Opal/Agate mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (compositionally various, primarily SiO2)
sedimentary
Ferruginous Siltstone or Mudstone
Ferruginous Siltstone / Goethitic Sandstone
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Honeycomb Coral Fossil
Favosites (extinct genus of tabulate coral)
sedimentary
Sandstone (Greywacke)
Arenite / Greywacke Sandstone
sedimentary
Sandstone (Ferruginous)
Arenite (Fe2O3 enriched)
sedimentary
Sandstone (Ferruginous)
Arenite (variable SiO2 with Fe2O3 staining)
sedimentary
Biotite Schist
Biotite Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Geode (Unopened)
SiO2 (Quartz-filled Sedimentary Nodule)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (with Feldspathic/Arkose qualities)
Arenite (primarily SiO2 with KAlSi3O8 components)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone with Iron Staining
Arenite (SiO2 with Fe-oxide impurities)
sedimentary
Limestone with Secondary Mineralization
Calcium Carbonate (CaCO3)
sedimentary
Glauconite (Green Sandstone)
Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2
sedimentary
Sandstone-based Concrete Fragment
Cementitious Composite with Sedimentary Aggregate
sedimentary (man-made/anthropogenic)
Mica Schist
Mica Schist (primarily Muscovite and Biotite composition)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Quartzite Pebble (River Rock)
Quartzite (mainly SiO2)
metamorphic
Banded Marble
Recrystallized Calcite (CaCO3)
metamorphic
Sandstone (Quartz-rich)
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 principal component)
sedimentary