Sandstone
Arenite (primarily SiO2)
sedimentary
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock (Possibly Composed Of Various Minerals) in the encyclopedia
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Granite
Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)
igneous
Sandstone
Quartz Sandstone (predominantly)
Sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Megalodon Shark Tooth
Otodus megalodon
fossil
Dyed Dalmatian Stone
Aplite (Alkali-feldspar granite) with Arfvedsonite
igneous
Assorted Beach Rocks and Pebbles
Various (Granite, Basalt, Quartz, Conglomerate, etc.)
igneous, sedimentary, metamorphic
Siltstone
Siltstone (primarily composed of SiO2 with various clay minerals)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Bauxite
Aluminium ore (Hydrated aluminium oxides AlOx(OH)3-2x)
sedimentary
Bauxite
Hydrated aluminum oxides (mixture of gibbsite, boehmite, and diaspore)
sedimentary
Bauxite
Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)
sedimentary
Bivalve Fossil (Fossilized Shell)
Class Bivalvia (fossilized in Calcium Carbonate/Aragonite)
fossil
Conglomerate
Conglomerate (Sedimentary Rock)
sedimentary
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Shale
Shale
sedimentary
Red Sandstone
Clastic sedimentary rock (primarily Quartz with Hematite)
sedimentary
Mixed River Pebbles and Jasper
Siliciclastic sediment and microcrystalline quartz
sedimentary
Metal Chain Belt with Square Plates
Not applicable (man-made)
Man-made Object (Metalwork)
Bumblebee Jasper
Carbonate-rich volcanic rock containing Sulfur and Arsenic (Realgar/Orpiment)
sedimentary
Chalcedony (Agate/Carnelian)
Cryptocrystalline Quartz (SiO2)
mineral
Bauxite
Alumina ore (Mixture of Gibbsite, Boehmite, and Diaspore)
sedimentary
Red Sandstone
Arenite (primarily SiO2 with Fe2O3)
sedimentary
Brecciated quartz-rich rock, possibly silicified breccia
Silica-rich breccia; chiefly microcrystalline quartz (SiO₂), with possible calcite and iron-oxide staining
sedimentary
Diorite (possibly fine-grained variety or a related intermediate intrusive rock like a felsic gabbro or a dark granodiorite)
Diorite (Igneous rock, intrusive, intermediate composition)
Igneous Rock
Gneiss Pebble
Gneiss
metamorphic
Red Sandstone
Arenite with Iron Oxide (Hematite) cement
sedimentary
Quartz (Rock Crystal) with minor impurities
Quartz (SiO2)
Mineral
Kambaba Jasper (Crocodile Jasper)
Stromatolitic Rhyolite/Jasper (SiO2)
sedimentary
Red Sandstone
Arenite (primarily Quartz with Iron Oxide coating)
sedimentary
Greenstone / Greenschist
Greenschist (composed of Chlorite, Epidote, and Actinolite)
metamorphic
Quartz Sand Grain / Micro Crystal
Silicon Dioxide (SiO2)
mineral
Shale
Sedimentary rock composed of clay minerals and quartz
sedimentary
Sandstone (Quartz-rich)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Sandstone
Arenite
sedimentary
Aggregate Concrete
Anthropogenic Conglomerate (Technosol)
sedimentary
Bauxite
AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)
sedimentary
Sandstone (Quartzose Pebble)
Clastic Sedimentary Rock (Litharenite/Quartz arenite)
sedimentary
Rounded reddish-brown pebble
Likely ferruginous sandstone or iron-rich quartzite; exact identification requires a fresh surface and tests
sedimentary
Chakra Stone Bracelet
Mixed Mineral Assembly (Scoria, Amethyst, Lapis Lazuli, Turquoise/Howlite, Impression Jasper, Tiger's Eye, Carnelian, Red Jasper)
igneous, metamorphic, and sedimentary
Quartz-rich mineral fragment
Quartz (silicon dioxide, SiO₂), possibly milky quartz
mineral