River Pebble (Siltstone / Fine-grained Sandstone)
Sedimentary Pebble (Siliclastic)
sedimentary
Category
This Is Not A Rock Or Mineral
Browse this is not a rock or mineral specimens identified by the Rock Identifier community.
Learn about This Is Not A Rock Or Mineral in the encyclopedia
View all →
Sandstone
Arenite (SiO2 dominant)
sedimentary
Quartz (Clear/Smoky Geode fragment)
Silicon Dioxide (SiO2)
mineral
Gossan (with Limonite/Hematite coating)
Ferruginous Gossan (Fe2O3·nH2O / Fe2O3)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Generic Pebble
Lithic Fragment
sedimentary
Veined Quartzite / Vein-filled Sedimentary Rock
Siliciclastic rock with iron oxide-filled fractures
sedimentary
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Sandstone with Manganese Dendrites
Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)
sedimentary
Quartz-Veined Slate or Greenstone
Metamorphic rock with quartz vein (SiO2)
metamorphic
River Stone (likely Basalt or Greywacke)
Basalt with mineral veining
igneous
Sandstone with Lichen and Iron Oxide Staining
Quartz Arenite / Sandstone
sedimentary
Vesicular Basalt (Lava Rock)
Vesicular Basalt
igneous
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg3Si2O5(OH)4)
metamorphic
Copper-bearing Quartz Vein in Host Rock
Quartz with Malachite/Chrysocolla staining
igneous/metamorphic with mineral
Xenolith in Basalt
Mafic Igneous Rock with Felsic Inclusion
igneous
Granite
Intrusive Igneous Rock (composed mainly of quartz, alkali feldspar, and plagioclase)
igneous
Pebble
Clast (specifically a granule or small pebble)
Sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone and Conglomerate pebbles
Sedimentary clastic rock
sedimentary
Granite Pebble (Pegmatitic Quartz-Feldspar River Rock)
Granite / Quartz-Feldspar-Mica Aggregate
igneous
Schist (likely Mica Schist)
Mica Schist
metamorphic
Pebble (likely Sandstone or Granitic Pebble)
Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)
Rock (likely Sedimentary)
Sandstone (Micaceous)
Clastic Sedimentary Rock (primarily SiO2 with Mica)
sedimentary
Red Sandstone
Arenite (primarily quartz with iron oxide cement)
sedimentary
Granite-like rock
Felsic intrusive igneous rock, probably granitic or granodioritic
igneous
Sandstone
Sandstone (clastic sedimentary rock)
Rock
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Granite
Intrusive Igneous Rock
igneous
Quartz Vein in Basalt or Mafic Rock
Silicon Dioxide (SiO2) vein in volcanic/mafic matrix
igneous
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone (Weathered Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Note: No specimen visible
N/A
Quartz Druzy (Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Sandstone (with Iron Staining)
Arenite (primarily SiO2 with Fe2O3/FeO(OH) oxides)
sedimentary
Druzy Quartz on Chert/Chalcedony
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Fossilized Brachiopod or Gastropod in Chert/Limestone
Phylum Brachiopoda / Mollusca
fossil
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony variety
sedimentary
Red Sandstone
Arenite (Iron-rich)
sedimentary
Basalt with Granite Inclusions (Xenoliths)
Mafic igneous rock (Basalt) with Sialic minerals
igneous
Milky Quartz with Country Rock contact
Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock
mineral