Sandstone pebble
Clastic sedimentary rock (primarily SiO2)
sedimentary
Category
Mineral On Sedimentary Rock
Browse mineral on sedimentary rock specimens identified by the Rock Identifier community.
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Granite
Phaneritic Igneous Rock (Granite)
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz Vein in Siltstone
Siltstone with Quartz (SiO2) inclusion
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 principal composition)
sedimentary
Shale or Argillite
Shale (sedimentary) / Argillite (metamorphic)
Sedimentary or Metamorphic (low-grade)
Sandstone / Quartzite
Sedimentary quartz arenite
sedimentary
River Rock (Basalt or Sandstone)
Clastic Sedimentary Rock or Extrusive Mafic Igneous Rock
igneous or sedimentary
Unidentified Dark Mineral or Rock
Indeterminate (Likely Silicon Dioxide or Carbon-based)
mineral
Limonite / Goethite (Ironstone Nodule)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Polished jasper or chert
Microcrystalline quartz (SiO₂), likely iron-stained jasper/chalcedony
mineral
Sandstone (likely Quartz Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Biotite gneiss (probable)
Foliated quartz–feldspar–mica gneiss; commonly containing biotite mica, quartz, and plagioclase/alkali feldspar
metamorphic
Weathered Sandstone or Siltstone
Sedimentary Rock
sedimentary
Sandstone or Limestone
Sedimentary Rock
Sedimentary
Red Painted Rock
Artificial Coated Lithic Fragment
sedimentary
Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral
Sandstone (likely Siltstone)
Arenite or Siltstone (high SiO2 content)
sedimentary
Iron-rich sandstone concretion
Ferruginous sandstone, cemented chiefly by iron oxides (such as goethite and hematite)
sedimentary
Sandstone (Graywacke)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Sandstone
Sandstone (Silicon dioxide, SiO2 based)
sedimentary
Sandstone pebble
Sandstone (Quartz-rich Arenite)
sedimentary
Concretion in Shale
Siltstone/Shale with Siderite or Calcareous concretions
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Geode (Unopened)
Silicon Dioxide (SiO2) in sedimentary host rock
sedimentary
Quartz geode/vug specimen
Quartz (SiO₂), likely in a weathered iron-oxide-rich host rock
mineral
Sandstone
Arenite
sedimentary
Sandstone (Pebble)
Arenite (primarily SiO2)
sedimentary
Common Pebble / Sedimentary Rock Fragment
Lithified clastic sediment
sedimentary
Iron-rich rock fragment (possibly ironstone or limonite/goethite)
Likely ironstone composed largely of goethite/limonite; image alone cannot confirm
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Foliated Metamorphic Rock (Gneiss)
metamorphic
Sandstone (Heart-shaped pebble)
Sedimentary Quartz Sandstone
sedimentary
Sandstone / Chert Gravel
SiO2 (Silicon Dioxide based clastic sedimentary rock)
sedimentary
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite/Limonite streaks)
sedimentary
Sandstone
Sandstone (SiO2-rich clastic sedimentary rock)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Travertine
Terrestrial Sedimentary Rock (CaCO3)
sedimentary
Sandstone (Pebble)
Sandstone
sedimentary
Dalmatian Jasper
Peralkaline rhyolite with arfvedsonite inclusions
igneous