Sandstone (Pebble/Conglomerate fragment)
Sandstone (clastic sedimentary rock)
Sedimentary Rock
Category
Synthetic (Not A Rock Or Mineral)
Browse synthetic (not a rock or mineral) specimens identified by the Rock Identifier community.
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Sandstone Pebble
Sedimentary Clastic Rock (Quartz Arenite)
sedimentary
Granite
Intrusive Felsic Igneous Rock
igneous
Granite Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Quartz-veined Sandstone Pebble
Quartzose Sandstone with Quartz Veinlets
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
River/Stream Pebble
Clast / Detrital Grain / Rounded Sedimentary Particle (Compositionally variable, commonly Quartz, Feldspar, Chert, or other resistant rock fragments)
Mineral, specifically a rock fragment
Granite
Intrusive igneous rock
igneous
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Quartz geode
Crystalline quartz, silicon dioxide (SiO₂), lining a volcanic geode
mineral
Amethyst
Amethyst (SiO2 with Iron impurities)
mineral
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Sandstone (Pebble)
Arenite / Clastic Sedimentary Rock
sedimentary
Fossilized tooth, likely a mammalian tooth fragment
Indeterminate fossil tooth; possibly an ungulate or carnivoran tooth
fossil
Wishing Stone (Gneiss or Basalt with Quartz Vein)
Gneiss or Metabasalt (with a Quartz or Calcite intrusion)
metamorphic
Sandstone
Arenite (SiO2 based typically)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone (Pebble)
Arenite (composed primarily of SiO2)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Sandstone (Yellow/Siltstone variant)
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Ferruginous)
Arenite (Fe2O3 enriched)
sedimentary
Limonite Concretion
Goethite-rich Concretion (FeO(OH))
sedimentary
Sandstone
Arenite
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Pink Granite / K-Feldspar
Alkali feldspar granite / Potassium feldspar (Microcline/Orthoclase)
igneous
Lava Rock (Basaltic Scoria)
Vesicular Basalt
igneous
Serpentine
Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4
metamorphic
Vesicular Basalt
Aphanitic Mafic Volcanic Rock
igneous
Lapis Lazuli (in Matrix)
Lazurite-bearing Metamorphic Rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2
metamorphic
Gneiss
Gneiss
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Granite
Intrusive Igneous Rock (Felsic)
igneous
River Cobble (likely Sandstone or Siltstone type)
Sandstone or Siltstone (common rock types that form river cobbles)
Sedimentary Rock (specifically a clastic sedimentary rock formed into a cobble)
Quartz Druzy Geode
Silicon Dioxide (SiO2)
mineral
Sandstone
Quartzose Sandstone / Lithic Sandstone
sedimentary
Quartz-bearing Ore (likely Gold-bearing Quartz)
Quartz (SiO2) with potential sulfide mineralization (Pyrite/Arsenopyrite)
mineral/hydrothermal
Gneiss
Gneiss (a metamorphic rock)
Metamorphic