Sandstone
Arenite (SiO2 primarily)
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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Sandstone
Clastic Sedimentary Rock (composed of SiO2 grains)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Jasper (specifically Yellow or Bumblebee-like Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Tumbled polymict breccia (probable quartz-rich breccia)
Clastic breccia composed mainly of quartz, feldspar, and iron-oxide-stained rock fragments
sedimentary
Granite
Granite (Phaneritic Igneous Rock)
igneous
Sandstone Pebble
Arenite (SiO2 based)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Metallic sulfide mineral specimen, likely pyrite
Pyrite (FeS₂), possibly a pyrite-rich sulfide aggregate
mineral
Sandstone
Quartz Arenite / Sedimentary Rock
sedimentary
Granodiorite
Intrusive Igneous Rock
igneous
Weathered quartz-rich rock, possibly sandstone or quartzite
Indeterminate; likely quartz sandstone (SiO₂-rich), possibly weakly metamorphosed quartzite
sedimentary
Asphalt Chunk (Bituminous Concrete)
Aggregated Bitumen / Artificial Breccia
sedimentary
Argillite
Argillite (Fine-grained sedimentary rock composed mostly of clay-sized particles)
sedimentary
Dalmatian Jasper (Dalmatian Stone)
Dalmatian Stone (primarily Feldspar, Quartz, and Arfvedsonite/Tourmaline)
igneous
Quartz Druzy Geode Fragment
Silicon Dioxide (SiO2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Tiger Carving (Banded Onyx or Calcite)
Banded Calcite (CaCO3)
sedimentary
Limonite
FeO(OH)•nH2O
mineral
Sandstone
Quartz Arenite / Clastic Sedimentary Rock
sedimentary
Chert (or possibly Flint)
Chert (variant: Flint)
Sedimentary
Granite
Intrusive Igneous Rock
igneous
Greenstone / Greenschist
Greenschist (composed of Chlorite, Epidote, Actinolite)
metamorphic
Granite (Giallo Ornamental / Venetian Gold)
Granite (composed mainly of Quartz, Feldspar, Biotite, and Garnet)
igneous
Weathered quartz-rich rock, likely silicified limestone or quartzite
Microcrystalline quartz (SiO₂), possibly with calcite (CaCO₃) and iron-oxide staining
metamorphic
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Sandstone
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Granite
Phaneritic plutonic rock (composed of quartz, alkali feldspar, and plagioclase)
igneous
Limestone
Limestone (primarily composed of Calcium Carbonate, CaCO3)
sedimentary
Red Sandstone
Sedimentary Clastic Rock (Quartz Arenite / Arkose)
sedimentary
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Rock (Quartz arenite or arkose)
sedimentary
Limestone (Brecciated/Recrystallized)
Calcium Carbonate (CaCO3)
sedimentary
Turquoise (likely stabilized or simulated Howlite)
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Greisen (Quartz-Muscovite-Turretine Rock)
Greisen
Metamorphic Rock
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Olivine in Basalt (Peridotite Xenolith)
Forsterite-rich Olivine (Mg2SiO4) in Aphanitic Basalt
igneous
Weathered greenish rock fragment
Indeterminate; possibly epidote- or chlorite-bearing altered silicate rock
mineral
Shiva Lingam
Cryptocrystalline Quartz and Iron Oxide
sedimentary
Basalt
Mafic volcanic rock (various silicate minerals)
igneous
Banded sandstone pebble
Lithic or quartz-rich sandstone; exact composition requires testing
sedimentary