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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Granite
Intrusive Igneous Rock
igneous
Sandstone
Sandstone (SiO2 dominated)
sedimentary
Sandstone
Sedimentary Clastic Rock
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary
Dalmatian Stone (commonly Dyed)
Dalmatian Jasper (Peralkaline igneous rock)
igneous
Peridotite
Ultramafic igneous rock
igneous
Shale with Limonite/Hematite Staining
Argillaceous sedimentary rock with Iron Oxides (FeO(OH)·nH2O / Fe2O3)
sedimentary
Lapis Lazuli
Lazurite-rich metamorphic rock (approx. (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Fossil Assortment and Geological Specimens
Various (including Ammonoidea)
fossil
Sandstone (Micaceous)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (SiO2 based with cement)
sedimentary
Quartz-rich pegmatitic rock, possibly rose quartz with mica
Granitic pegmatite; predominantly quartz (SiO₂), with feldspar and mica
igneous
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Conglomerate
Conglomerate (a clastic sedimentary rock)
Sedimentary
Quartz on Sandstone
Silicon Dioxide (SiO2) in Lithic Sandstone
sedimentary
Jasper
Jasper (Cryptocrystalline Quartz; SiO2)
sedimentary
Graphic Granite (or Rapakivi-textured Granite)
Alkali feldspar granite
igneous
Red Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
sedimentary
Sandstone
Arenite (primarily composed of SiO2 - Silicon Dioxide)
sedimentary
Sandstone
Sandstone (Silicon Dioxide, SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Pink granite
Granite, chiefly quartz, potassium feldspar, plagioclase, and biotite/hornblende
igneous
Red Jasper (possibly)
Jasper (a variety of Chalcedony, SiO2)
Mineral
Quartz-rich rock, possibly milky quartz or quartzite
Quartz (SiO₂), potentially quartzite if the grainy texture is rock-wide
mineral
Weathered quartz-bearing rock, possibly sandstone or quartzite
Provisional: quartzite (mostly SiO₂); could alternatively be iron-stained quartz sandstone
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Fossil Coral
Fossilized Scleractinia or Tabulata (various genera/species)
Sedimentary
Gneiss
Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)
metamorphic
Sandstone (likely Quartz Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Limonite
FeO(OH)•nH2O
mineral
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Weathered iron-rich rock, possibly laterite or limonite-bearing stone
Hydrated iron oxides/hydroxides, chiefly limonite-goethite mixture; exact identification requires testing
mineral
Shark Tooth Fossil
Carcharocles megalodon or similar extinct shark tooth
fossil
Quartz pebble (Agate / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Sandstone (Painted)
Arenite (primarily SiO2)
sedimentary
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony variety
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Dalmatian Stone
Dalmatian Jasper (Aplite rock composition)
igneous
Mixed river-worn rock and mineral collection
Mostly quartz/quartzite, feldspar-bearing granitoid, chert, and mafic volcanic rocks; exact species vary by pebble
igneous, sedimentary, metamorphic, mineral