Sandstone
Arenite (primarily SiO2)
sedimentary
Category
Sedimentary Or Metamorphic (Base Substrate)
Browse sedimentary or metamorphic (base substrate) specimens identified by the Rock Identifier community.
Sandstone (Quartz-rich)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Sandstone
Arenite
sedimentary
Quartz (Granular)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Magnetic Sand Grain / Magnetite Pellet
Magnetite (Fe3O4)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Crystal Fragment
Silicon Dioxide (SiO2)
mineral
Note: Image shows a biological specimen (Rat), not a rock. Representative geological equivalent: Galena (due to lead-grey colors in fur).
Galena (PbS)
mineral
Glauconitic Sanstone (Glauconite)
Glauconite ((K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Asphalt Concrete (Bituminous Conglomerate)
Anthropogenic Bituminous Conglomerate
sedimentary
Pebble (likely Limestone or Siltstone)
Lithic fragment (calcareous or siliciclastic)
sedimentary
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Mica Schist
Mica Schist (primarily Muscovite and Biotite phyllosilicates)
metamorphic
Dalmatian Stone
Dalmatian Jasper (Peralkaline Quartz-Feldspar Rock)
igneous
Limestone
Limestone (Calcium Carbonate - CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartzite in Conglomerate
Clastic Sedimentary Rock with Silicon Dioxide (SiO2) inclusions
sedimentary
Opal
Hydrated amorphous form of silica (SiO2·nH2O)
mineral
Glauconite (Sandstone or Shale)
Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Fossiliferous Limestone (Crinoidal)
Bioclastic Limestone (predominantly CaCO3)
sedimentary
Amber in Matrix
Succinite (Carbon-based organic polymer)
Organic (Sedimentary context)
Dendritic Agate
Silicon Dioxide with Manganese or Iron Oxide inclusions (SiO2 + Mn/Fe)
mineral
Aquamarine with Sunstone
Aquamarine (Be3Al2Si6O18), Sunstone (Na,Ca)Al(Si,Al)Si2O8
Mineral
Chert (specifically Jasper/Flint pebble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Vein in Sandstone
Hydrothermal Quartz (SiO2) in Arenite
sedimentary
Poppy Jasper
Jasper (variety of Chalcedony), SiO2 (Silicon Dioxide)
sedimentary
Fossil Coral (Honeycomb Coral)
Favosites (extinct genus of Tabulate coral)
sedimentary
Garnet in Matrix
Almandine or Spessartine Garnet in Quartz/Schist Matrix (X3Al2(SiO4)3)
metamorphic
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Greywacke/Lithic Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Conglomerate
Conglomerate (Sedimentary rock)
sedimentary
Siltstone
Siltstone (primarily SiO2 with Al2O3)
sedimentary
Crushed Stone (Likely Limestone or Granite)
Calcium Carbonate (CaCO3) for Limestone / Quartz and Feldspar for Granite
sedimentary or igneous
Mica Schist with Garnet
Garnetiferous Mica Schist
metamorphic
Garnet Schist
Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)
metamorphic
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron Oxide inclusions
mineral
Sandstone (likely Arkosic or Quartzose)
Arenite (SiO2 based with mineral inclusions)
sedimentary
Sandstone (likely Arkosic or Lithic Sandstone)
Arenite (SiO2 based with mineral inclusions)
sedimentary