Sandstone
Arenite (SiO2 based)
sedimentary
Category
Sedimentary (Man Made Composite)
Browse sedimentary (man made composite) specimens identified by the Rock Identifier community.
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River Stone (composed of Siltstone/Basalt mixture)
Siltstone or microcrystalline Basalt pebble
sedimentary
River Stones (Basalt and Sedimentary Rock)
Basalt (dark specimen) and Siltstone/Mudstone (reddish specimen)
igneous and sedimentary
Sandstone
Arenicola (comprising mostly Quartz, SiO2)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Wishing Stone (Quartz-veined Sedimentary Pebble)
Silicified sedimentary rock with quartz vein (SiO2)
sedimentary
Banded Sedimentary Rock (Wishbone Stone / Banded Quartzite or Limestone)
Silicified limestone or banded sedimentary rock with mineral veins
sedimentary
Sedimentary Rock with Crafts (Pet Rock)
Sedimentary rock decorated with synthetic materials
sedimentary
Apatite
Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)
mineral
Chert (Flint) with Limestone Matrix
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Shale
Fossiliferous Mudstone / Shale
sedimentary
Limestone (with crushed gravel)
Limestone (Calcium Carbonate, CaCO3)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Moqui Marble (Sandstone Concretion)
Hematite-cemented Sandstone (Fe2O3 + SiO2)
sedimentary
Sandstone Pebble
Quartzose Sandstone (Sedimentary Rock)
sedimentary
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Sandstone Chert/Quartzite
Silicon Dioxide (SiO2) - Sedimentary Sandstone / Orthoquartzite
sedimentary
Sandstone (Quartzite-leaning)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (primarily Quartz-rich)
sedimentary
Sandstone
Arenite
sedimentary
Oolitic Limestone
Oolite (Sedimentary rock composed of CaCO3)
sedimentary
Conglomerate
Conglomerate Rock
sedimentary
Septarian Nodule (Septarian Dragon Stone)
Septarian Concretion (Composition: Calcite, Aragonite, and Limestone/Clay)
sedimentary
Chert (with Calcite layering)
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Pink Quartz
Silicon Dioxide (Quartz), SiO2
mineral
Mica
Mica group (often Muscovite or Biotite)
mineral
Clear Quartz
SiO2 (Silicon Dioxide)
gemstone
Conglomerate (Red Sandstone variety)
Clastic Sedimentary Rock (Conglomeratic Sandstone)
sedimentary
Tumbled brecciated jasper
Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions
mineral
Sedimentary Strata of the Badlands (Mudstone, Siltstone, and Sandstone)
White River Group (Brule and Chadron Formations)
sedimentary
Jasper (Sedimentary variety)
Silicon Dioxide (SiO2) with impurities
sedimentary
Chalk (Sedimentary Pebble)
Calcium Carbonate (CaCO3) - Biogenic Limestone
sedimentary
Fossiliferous Sedimentary Rock (Coquina/Limestone)
Fossiliferous Calcarenite / Bioclastic Limestone
sedimentary
Weathered brown stone, possibly basalt or iron-rich sedimentary rock
Indeterminate from photograph; likely fine-grained mafic rock (basalt) or ferruginous sandstone
igneous
Sandstone Pebbles
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Banded Agate / Shell Fossil Fragment
Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite
sedimentary