Red Sandstone
Arenite (composed primarily of SiO2 with Fe2O3 cementation)
Category
Browse sedimentary (artificial) specimens identified by the Rock Identifier community.
Red Sandstone
Arenite (composed primarily of SiO2 with Fe2O3 cementation)
Gastropod Steinkern (Fossil Snail Internal Mold)
Class Gastropoda (Internal Mold)
Sandstone (with ripple marks)
Arenite (SiO2 primarily)
Green Chert
Microcrystalline Quartz (SiO2)
Chert (and Petrified Wood)
Silicon Dioxide (SiO2)
Chert (specifically Jasper or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sandstone with Liesegang Rings
Arenite with secondary Iron oxide (Limonite/Goethite) precipitation
Red Jasper (possibly Chert/Argillite)
Jasper (SiO2) with iron oxide inclusions
Ironstone (Limonitic Concretion)
Limonite (FeO(OH)·nH2O) with Goethite and Hematite inclusions
Ironstone Concretion (Iron-rich Mudstone)
Siderite / Geothite concretion (FeCO3 / FeO(OH))
Sandstone (River Pebble)
Arenite (SiO2 based)
Chert (Common Opal variant)
Silicon Dioxide (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Fossiliferous Limestone
Limestone with fossil inclusions (CaCO3)
Banded Chert (or Banded Jasper)
Silicon Dioxide (SiO2) with Iron Oxide impurities (Hematite/Goethite)
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
Quartz Crystal
Quartz (SiO₂)
Quartz
Silicon Dioxide (SiO2)
Pyrite
Pyrite (FeS2)
Quartz (likely a form of massive or vein quartz)
Quartz (SiO₂)
Chert
Chert (microcrystalline quartz)
Pyrite
Iron Sulfide (FeS2)
Gneiss
Gneiss
Pyrite
Iron Disulfide (FeS2)
Red Jasper
Silicon Dioxide (SiO2)
Yellow Chert (Cherty Pebble)
Silicon Dioxide (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
Amber
Succinates (C10H16O)
Pyrite
Iron Sulfide (FeS2)
Garnet Schist
Almandine-mica schist
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
Quartz (Grain)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (Milky/Sugar variety)
Silicon Dioxide (SiO2)
Chert Pebble
Silicon dioxide (SiO2)
Chert
Cryptocrystalline Quartz (SiO2)
Garnet in Matrix
Almandine or Spessartine Garnet in Quartz/Schist Matrix (X3Al2(SiO4)3)
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
Pyrite in Quartz
Iron Disulfide (FeS2) in Silicon Dioxide (SiO2)
Jasper
Silicon dioxide (SiO2)