Laterite (iron-rich nodule, possibly Bauxite as a subtype)
Laterite (composed of various minerals including goethite, hematite, gibbsite, etc.)
Sedimentary
Category
Sedimentary Or Igneous Fragment
Browse sedimentary or igneous fragment specimens identified by the Rock Identifier community.
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Sandstone
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Sandstone Pebble
Arenite (SiO2 dominated with iron oxide)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)
sedimentary
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Biotite Schist
Biotite-rich Schist
metamorphic
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone (with Iron Staining)
Arenite (SiO2 predominantly)
sedimentary
Fossiliferous limestone
Bioclastic limestone, primarily calcite (CaCO₃)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Brecciated Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Limestone (with potential fossil inclusions)
Calcium Carbonate (CaCO3)
sedimentary
Jasper-Agate Breccia
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Gravel and Pebbles
Unconsolidated rock fragments (clastic sediment)
sedimentary
Gravel and Pavement Aggregates
Unconsolidated rock fragments / detrital sediments
sedimentary
Conglomerate
Sedimentary Conglomerate with Basaltic Clast
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Orange calcite
Calcite (CaCO₃)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone (Greywacke)
Arenite / Greywacke Sandstone
sedimentary
Gravel and River Pebbles
Unconsolidated rock fragments / Detrital sediment
sedimentary
Riverstone (Sandstone Pebble)
Arenite (SiO2 with various lithic fragments)
sedimentary
Basalt
Mafic Igneous Rock (composed primarily of Plagioclase and Pyroxene)
igneous
Basalt
Mafic Volcanic Rock
igneous
Likely basalt (possibly a dark beach pebble)
Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase and pyroxene, commonly with olivine
igneous
Vesicular quartz-rich rock, possibly weathered rhyolite or silicified volcanic breccia
Silica-rich volcanic rock; likely microcrystalline quartz (SiO₂) with altered feldspar and iron-oxide staining
igneous
Garnet Gneiss or Mica Schist with Garnet
Almandine Garnet-bearing Gneiss
metamorphic
Chert (or potentially massive Quartz/Quartzite)
SiO2 (Silicon Dioxide)
sedimentary (if chert) / metamorphic (if quartzite)
Sandstone (Quartzose Sandstone)
Arenite (SiO2 principal component)
sedimentary
Red Sandstone
Sandstone (Iron Oxide Rich)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (River Stone)
Arenite (primarily SiO2)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Rough Green Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Conglomerate
Conglomerate (Detrital Sedimentary Rock)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide (Fe2O3) cement
sedimentary