Conglomerate
Conglomerate (a clastic sedimentary rock)
Sedimentary
Category
Sedimentary Rock Or Mineral (Depending On Origin And Purity)
Browse sedimentary rock or mineral (depending on origin and purity) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock Or Mineral (Depending On Origin And Purity) in the encyclopedia
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River Rock
Siliciclastic rock (water-worn pebble)
sedimentary
Turquoise
Hydrated phosphate of copper and aluminum; CuAl6(PO4)4(OH)8·4H2O
mineral
Fossil Shell (Bivalve)
Class Bivalvia (fossilized)
fossil
Weathered sandstone or limestone fragment
Likely quartz-rich sandstone or micritic limestone; exact identification requires testing
sedimentary
Breccia
Breccia (Sedimentary Clastic Rock)
sedimentary
Quartz (Water-worn Pebble)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Possible fossilized shell or coral fragment
Indeterminate biogenic carbonate, likely calcite (CaCO₃)
fossil
Fossil Shark Tooth
Selachii (fossilized dentition)
fossil
River Pebbles (Mixed Lithology)
Conglomerate clasts (Silica-rich and Metamorphic assemblages)
sedimentary
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Weathered Pebble)
Arenite (primarily SiO2)
sedimentary
Fragmented Sedimentary Pebble
Clastic Sedimentary Specimen
sedimentary
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement (primarily SiO2 with Fe2O3/FeOOH)
sedimentary
Sandstone
Arenite (composed primarily of SiO2, or Silicon Dioxide)
sedimentary
Quartz Sand/Gravel
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Quartzite-rich Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Moldavite
Moldavite (Siliceous vitreous substance)
tektite (natural glass)
Hagstone (Adder Stone)
Chert or Sedimentary pebble with natural perforation
sedimentary
Sandstone with Iron Staining
Arenite (SiO2 based with Fe2O3 staining)
sedimentary
Tumbled Stone
Silicon dioxide / Various silicates
mineral
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone (likely Graywacke or Siltstone variety)
Clastic Sedimentary Rock (SiO2 with assorted mineral fragments)
sedimentary
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in Geode form
sedimentary
Sandstone (with Feldspathic/Arkose qualities)
Arenite (primarily SiO2 with KAlSi3O8 components)
sedimentary
Quartz (Milky Quartz)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Veined Quartzite / Vein-filled Sedimentary Rock
Siliciclastic rock with iron oxide-filled fractures
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Quartz pebble
Silicon Dioxide (SiO2)
sedimentary
Basalt with Xenolith
Extrusive Igneous Rock containing Mantle Xenolith
igneous
Sandstone
Quartz Sandstone (predominantly)
Sedimentary
Druzy Quartz on Matrix (likely Limestone or Sandstone)
Silicon Dioxide (SiO2) with various trace impurities
Mineral on Sedimentary Rock
Quartz Geode (Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Weathered Sedimentary Rock with Liesegang Rings
Sandstone or Siltstone with Iron Oxide Banding
sedimentary
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary