Sandstone
Arenite (SiO2 composition dominant)
sedimentary
Category
Sedimentary Rock
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Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz on Host Rock
Silicon Dioxide (SiO2)
Mineral Specimen
Sandstone (Red)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (River Rock)
Arenite (composed primarily of SiO2)
sedimentary
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide matrix
sedimentary
Chert (Flint/Novaculite)
Microcrystalline Quartz (SiO2)
sedimentary
Green Quartz (Prasiolite/Adventurine)
Silicon Dioxide with inclusions (SiO2)
mineral
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (likely Calcareous or Quartz-rich)
Arenite (SiO2 based typically)
sedimentary
Sandstone (with ripple marks)
Arenite / Quartz Sandstone
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Fossil Coral
Scleractinia (fossil order), primarily Calcium Carbonate (CaCO3)
sedimentary
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone (with potential iron mineralization)
Arenite
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Weathered Sandstone with Algae Growth
Arenite
sedimentary
Sandstone (Pebble)
Arenite (composed primarily of SiO2)
sedimentary
Feldspar-rich Quartzite
Meta-arkose (Quartz-Feldspar Quartzite)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron-Oxide cement
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3 inclusions)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Limestone with Fossil Imprints
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (lithic wake/graywacke variety)
Arenite/Greywacke (SiO2 with lithic fragments)
sedimentary