Sandstone
Arenite (primarily SiO2 with various cementing agents)
sedimentary
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
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Mica-rich schist (possibly phyllite)
Mica schist, composed mainly of muscovite/biotite and quartz; exact identification requires testing
metamorphic
Sandstone (Micaceous/Feldspathic variant)
Arenite (specifically subarkose or lithic arenite)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartz-rich)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone with trace fossil
Sandstone, possibly with Skolithos or similar trace fossil
sedimentary
Sandstone (with Feldspathic/Arkose qualities)
Arenite (primarily SiO2 with KAlSi3O8 components)
sedimentary
River Rock (River Cobbles)
Fluvial Conglomerate Clasts (primarily composed of various minerals such as Quartz, SiO2)
sedimentary
Red Shale
Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)
sedimentary
Quartz cluster, possibly druzy quartz on matrix
Quartz (SiO₂), likely microcrystalline to coarse crystalline; associated matrix uncertain
mineral
Sandstone (likely Quartzose Sandstone with mineral staining)
Arenite (composed mainly of SiO2)
sedimentary
Sandstone (Quartzite-rich Pebble)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)
sedimentary
Sandstone (specifically Arkose or Ferruginous Sandstone)
Sandstone (SiO2 predominant)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz / Common Agate
Silicon Dioxide (SiO2)
mineral
Quartz (variety of colors)
SiO2 (Silicon Dioxide)
Mineral
Mica-rich metamorphic rock (likely mica schist)
Mica schist, composed mainly of muscovite and/or biotite with quartz and possibly feldspar
metamorphic
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Shark Tooth Fossil
Chondrichthyes tooth
fossil
Rock and Mineral Collection
Mixed Geological Specimens
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone Concretion
Clastic Sedimentary Rock - Quartz Arenite / Sandstone
sedimentary
Likely bituminous coal
Coal, predominantly carbon-rich organic matter; rank and composition cannot be confirmed from the image
sedimentary
Sandstone
Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)
Sedimentary Rock
Shark Tooth Fossil
Chondrichthyes fossilized tooth
fossil
Granitoid (Commonly Granite)
Phaneritic Felsic Igneous Rock
igneous
Mica-rich schist (probable)
Mica schist, composed mainly of mica minerals with quartz and possibly feldspar
metamorphic
Granite
Phaneritic Felsic Igneous Rock
igneous
Sandstone (Pebble/Conglomerate fragment)
Sandstone (clastic sedimentary rock)
Sedimentary Rock
Mixed Rock and Mineral Specimen Set
Multiple (Quartz, Chert, Shale)
mineral
Sandstone (lithic/greywacke variety)
Arenite (composed primarily of SiO2 with various lithic fragments)
sedimentary
Granite
Phaneritic intrusive igneous rock
igneous
Veined Pebble (likely a Quartz-Veined Pebble)
Pebble with Mineral Vein (e.g., Quartz Vein in a Chert/Mudstone Pebble)
Sedimentary Rock (possibly conglomerate or breccia with a quartz vein)
Unakite
Unakite (Metasomatized Granite)
metamorphic
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz, SiO2)
sedimentary
Red Sandstone
Sedimentary Litharenite / Quartz Arenite
sedimentary
Sandstone
Sandstone (clastic sedimentary rock)
Rock
Red Sandstone
Clastic sedimentary rock (Quartz arenite/Arkose)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Greenstone pebble (likely serpentinite)
Serpentinite, composed mainly of serpentine-group minerals
metamorphic