Sandstone (River Pebble)
Arenite (SiO2 based)
sedimentary
Category
Sedimentary Rock
Browse sedimentary rock specimens identified by the Rock Identifier community.
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Limonitic Iron Ore / Goethite
Hydrated Iron(III) oxide-hydroxide (primarily FeO(OH)·nH2O)
sedimentary
Wishing Stone (Basalt or Siltstone with Quartz/Calcite Vein)
Basalt (SiO2+MgO+FeO) or Siltstone with a Quartz (SiO2) or Calcite (CaCO3) vein
igneous or sedimentary
Sandstone with Iron Staining
Arenite with Limonite/Hematite inclusions (SiO2 + Fe2O3/FeO(OH))
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (with banding)
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartz-rich)
Sandstone (SiO2 dominated)
sedimentary
Sandstone with Iron Oxide (Limonite/Hematite)
Ferruginous Sandstone (SiO2 with FeO(OH)·nH2O)
sedimentary
Sandstone (River Stone)
Arenite (primarily SiO2)
sedimentary
Quartz Druzy (on Geode Fragments)
Silicon Dioxide (SiO2)
mineral
Concretion with Quartz Veining
Septarian Concretion (CaCO3 / SiO2)
sedimentary
Red Sandstone (Iron-Rich)
Arenite (Fe2O3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Honeycomb Coral Fossil
Favosites (extinct genus of tabulate coral)
sedimentary
Dalmatian Jasper
Peralkaline rhyolite
igneous
Dalmatian Jasper
Peralkaline Quartz Feldspar Porphyry
igneous
Sandstone
Sandstone (lithified sand)
sedimentary
Dragon Blood Jasper
Quartz (SiO2) with Epidote and Piedmontite inclusions
sedimentary
Dalmatian Jasper (Dyed Blue)
Peralkaline Rock with Arfvedsonite and Blue Dye
igneous
Dalmatian Stone
Dalmatian Jasper (Aphanitic Igneous Rock with Arfvedsonite inclusions)
igneous
Limestone with Lichen
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Carnelian
Carnelian (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon dioxide (SiO2)
mineral
Quartz-veined Gneiss
Gneiss with Quartz (SiO2) intrusions
metamorphic
Garnet Schist
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
metamorphic
Sandstone (Pebble)
Arenite (primarily SiO2)
sedimentary
Chalcedony (Agate)
Quartz (Silicon Dioxide, SiO2)
mineral
Bumblebee Jasper
Volcanic Tuff (mixture of Quartz, Sulfur, Hematite, and Orpiment)
igneous
Sandstone
Arenite (SiO2 based with various cements)
sedimentary
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Sandstone (specifically an Iron-Concretion)
Arenite with Iron Oxide (Limonite/Goethite) cementation
sedimentary
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Sandstone (Flagstone)
Arenite (composed primarily of SiO2)
sedimentary
Fossiliferous Limestone
Fossiliferous Calclutite / Bio-calcarenite (CaCO3)
sedimentary
Gneissic Schist
Gneiss-schist (Metamorphic rock)
metamorphic
Quartz Druzy
Silicon Dioxide (SiO2)
mineral
Chalcedony (Grey/White Agate)
Silicon Dioxide (SiO₂)
mineral
Yellow Quartz (Citrine or Yellow Jasper)
Silicon Dioxide (SiO2)
mineral
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineral
Gneiss (Green Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary