Sandstone
Quartzose Sandstone (Sedimentary Rock)
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Sandstone
Quartzose Sandstone (Sedimentary Rock)
Chert (River Siltstone/Quartzite)
Sedimentary Cryptocrystalline Quartz (SiO2)
Sandstone (Quartz Sandstone / Iron-stained Sandstone)
Sandstone (SiO2 with iron oxide impurities)
Limestone
Calcium Carbonate (CaCO3)
Rounded gray river pebble, likely fine-grained sandstone or siltstone
Indeterminate clastic sedimentary rock; possibly quartz-rich sandstone or siltstone
Milky quartz fragment
Quartz (silicon dioxide, SiO₂)
Milky quartz (likely quartz vein fragment)
Quartz, silicon dioxide (SiO₂)
Banded Chert
Chert (Silicon Dioxide, SiO2)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone (with secondary weathering/concretion)
Arenite (composed primarily of Quartz, SiO2)
Sandstone (likely Quartzose Sandstone with mineral staining)
Arenite (composed mainly of SiO2)
Sandstone (Ferruginous)
Arenite (Fe-rich)
Reddish Brown Claystone or Siltstone
Argillite / Siltstone / Claystone
Sandstone (Pebble)
Arenite (SiO2 based)
Jasper
Microcrystalline Quartz (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Sandstone
Quartz Arenite / Clastic Sedimentary Rock
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Chert (Yellow Jasper)
Silicon dioxide (SiO2) with iron oxide inclusions
Quartz (Chert/Chalcedony variant)
Silicon dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with goethite or iron oxide inclusions
Fossiliferous limestone
Calcarenite/bioclastic limestone, predominantly calcite (CaCO₃)
Pyrite Nodule
Iron Sulfide (FeS2)
Pyrite Nodule
Iron Sulfide (FeS2)
Shale (possibly)
Shale (fine-grained clastic sedimentary rock)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Possible iron-rich chert or slag-like rock
Microcrystalline quartz (SiO₂), possibly iron-stained chert; exact identification is uncertain from the image
Agate Bookend / Quartz Geode
Silicon Dioxide (SiO2)
Banded Sandstone (River Pebble)
Clastic Sedimentary Rock (SiO2 with impurities)
Sandstone Pebbles
Arenite
Sandstone (Ferruginous)
Arenite with Iron Oxide matrix
Sandstone
Arenite (mainly SiO2 with varying cements)
Fossiliferous Limestone
Limestone (CaCO3 - Calcium Carbonate)
Sandstone (Iron-stained)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
Sandstone (Weathered Cobble)
Clastic sedimentary rock (primarily SiO2)
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Sandstone
Arenite (primarily SiO2 with iron oxide cementation)
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Sandstone (Weathered)
Arenite (primarily SiO2)