Sandstone
Arenite
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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Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
sedimentary
Fossilized oyster or bivalve shell
Fossil Gryphaeidae or Ostreoidea; calcitic shell, CaCO₃
fossil
Educational Geologic Collection
Mixed Mineral and Rock Collection (Various compositions)
mineral
Sandstone
Arenite (Quartz Sandstone)
sedimentary
Mixed Tumbled Stones Collection
Mixed Silicates and Carbonates (Quartz, Amorphous Silica, Carbonates)
multiple
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Druzy Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 predominantly)
sedimentary
Ferruginous Sandstone (Ironstone)
Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)
sedimentary
Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
Ironstone Concretion (Limonite/Goethite)
Ironstone (composed primarily of Goethite FeO(OH) and Limonite)
sedimentary
Malachite in Host Rock
Malachite - Cu2CO3(OH)2
mineral
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Weathered quartz-rich rock, possibly pegmatite or quartzite
Quartz (SiO₂)-rich aggregate; exact identification is uncertain from the photograph
igneous
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Shale
Fissile Mudstone (primarily composed of clay minerals and quartz)
sedimentary
Calcite (likely a tumbled specimen)
Calcite (CaCO 3 )
Mineral
Lapis Lazuli
Lapis Lazuli (Mineral composition: Lazurite, Calcite, Sodalite, and Pyrite)
metamorphic
Lapis Lazuli
Lapis Lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Sandstone (with carbonaceous plant fragments)
Arenite (composed primarily of SiO2)
sedimentary
Red Sandstone
Ferruginous Sandstone (SiO2 dominated with Fe2O3)
sedimentary
Dalmatian Stone
Dalmatian Stone (formerly called Dalmatian Jasper)
igneous
Sandstone
Sandstone (lithified quartz arenite, arkose, graywacke, etc. depending on composition)
Sedimentary Rock
Dalmatian Stone
Dalmatian Jasper (Aplitic Perthite)
igneous
White Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite or arkose)
sedimentary
Porphyritic Basalt
Amygdaloidal Porphyritic Basalt
igneous
Sandstone (Pebble)
Sandstone (SiO2 dominated clastic sedimentary rock)
sedimentary
Sandstone
Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)
sedimentary
Botryoidal Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (Quartz Arenite)
Sandstone (SiO2 with possible mineral cements)
sedimentary
Red Sandstone
Arenite (composed primarily of Quartz and Iron Oxide)
sedimentary
Granite (likely weathered quartz-bearing granite)
Granite; primarily quartz, feldspar, and mica/amphibole
igneous
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Sedimentary Rock (Quartz Arenite)
sedimentary
Siltstone River Rock
Siltstone (composed of silt-sized particles, silicate minerals)
sedimentary
Granite
Granite (a plutonic igneous rock)
Igneous