Sandstone
Sandstone (Arenite)
sedimentary
Category
Sedimentary Rock Or Mineral (Depending On Origin And Purity)
Browse sedimentary rock or mineral (depending on origin and purity) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock Or Mineral (Depending On Origin And Purity) in the encyclopedia
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River Rock (Basalt/Greywacke pebbles)
Fluvial gravel primarily composed of Mafic Volcanic Rock (Basalt) or Lithic Sandstone (Greywacke)
igneous and sedimentary
Weathered granite or granitic gneiss
Granite; chiefly quartz, feldspar, and biotite/hornblende
igneous
Green Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Granodiorite
Phaneritic Plutonic Rock (Granodiorite)
igneous
Quartzite (Yellow/Orange variety)
Quartzite (primarily SiO2)
metamorphic
Carnelian (Orange Agate)
Silicon Dioxide (SiO2)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Fossil Seashell
Invertebrate fossil (Bivalvia)
fossil
Small quartz-rich rock fragment (tentative)
Quartz, silicon dioxide (SiO₂), possibly in a feldspar-bearing granite fragment
mineral
Red Sandstone (Iron-rich)
Arenite (with Hematite cement)
sedimentary
Sandstone Concretion
Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)
sedimentary
Quartz-rich mineral fragment
Quartz (silicon dioxide, SiO₂), possibly milky quartz
mineral
Quartz Crystal Rock
Silicon Dioxide (SiO2)
mineral
Garnet Gneiss
Gneiss containing almandine-pyrope garnet
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Tiger Iron
Tiger Iron (Composition: SiO2, Fe2O3, Fe3O4)
metamorphic
Weathered mica-rich metamorphic rock
Probable biotite schist or mica schist
metamorphic
Tumbled Chalcedony
Quartz (Silicon Dioxide - SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Banded gneiss (likely orthogneiss or paragneiss)
Gneiss; composition commonly quartz + feldspar + mica, with possible amphibole/biotite
metamorphic
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
sedimentary
Thunderegg (Agate or Quartz Geode)
Silica-filled rhyolitic nodule (SiO2)
sedimentary
Limestone Gravel
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Yellow Quartz (Chalcedony or Agate)
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate
Sedimentary Rock
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Anthropogenic Heat Source (Electronic/Industrial Interface)
Thermal IR emission (Electronic infrastructure)
not a rock or mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Clear Quartz (Rock Crystal Fragments)
Silicon Dioxide (SiO2)
mineral
Basalt Cobble
Aphanitic Mafic Igneous Rock (Basalt)
igneous
Jadeite Bangle
NaAlSi2O6 (Jadeite pyroxene mineral aggregate)
gemstone
Mixed River Pebbles (including Unakite and Jasper)
Polymineralic geological specimens
igneous and sedimentary
Iron Slag
Anthropogenic Vitreous Silicate (Byproduct of Smelting)
Mineral-like byproduct
Coquina / Shelly Sandstone
Calcareous Sandstone / Coquina
sedimentary
Conglomerate
Conglomerate (Sedimentary Rock)
sedimentary
Schist
Schist
metamorphic
Sandstone (with cross-bedding)
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Fossil Coral
Fossilized Scleractinia or Tabulata (various genera/species)
Sedimentary
Jasper with Quartz Druzy
Silicon Dioxide (SiO2)
sedimentary
Sandstone (River Pebble)
Arenite (SiO2 based)
sedimentary