Sandstone (specifically Red Sandstone)
Arenite (SiO2 with Iron Oxide)
Category
Browse mineral on sedimentary rock specimens identified by the Rock Identifier community.
Sandstone (specifically Red Sandstone)
Arenite (SiO2 with Iron Oxide)
Sandstone (Red)
Arenite (primarily SiO2 with Iron Oxide staining)
Sandstone (Quartzite Pebble)
Arenite / Metamorphosed Sandstone (SiO2)
Sandstone (Micaceous/Feldspathic variant)
Arenite (specifically subarkose or lithic arenite)
Quartz (Milky Quartz)
Silicon Dioxide (SiO₂)
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
Quartz (Drusy/Crystalline variety)
Silicon Dioxide (SiO2)
Banded Agate (Tumbled)
Cryptocrystalline Quartz (SiO2)
Carnelian Agate
Carnelian (Silicon Dioxide: SiO2)
Opal
Hydrated Silica (SiO2·nH2O)
Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O
Calamites (Fossilized Horsetail)
Calamites suckowii (Family: Calamitaceae)
Dalmatian Stone (Dalmation Jasper)
Aplite with Arfvedsonite inclusions
Red Sandstone
Arenite (Ferruginous Sandstone)
Sandstone
Arenite (primarily Quartz, SiO2)
Quartz with Mica inclusions (likely Schist or Gneiss host)
Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
Picture Jasper
Silicon dioxide (SiO2)
Kambaba Jasper (Crocodile Jasper)
Stromatolitic Rhyolite/Jasper (SiO2)
Sandstone (Ferruginous/Red Sandstone)
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in Geode form
Carnelian (Red Chalcedony)
Silicon Dioxide (SiO2) - variety of Chalcedony
Agate
Chalcedony (cryptocrystalline variety of Quartz, SiO2)
Clear Quartz Cluster
Quartz (Silicon Dioxide - SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Yellow Chalcedony
Silicon Dioxide (SiO2)
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Hag Stone
Perforated Sedimentary Rock (typically Limestone or Sandstone)
Chert (Flint Nobule)
Silicon Dioxide (SiO2)
Ironstone Concretion (Moqui Marble type)
Iron oxide concretion (Goethite/Hematite and Sandstone)
Quartz (Milk Quartz / Massive Quartz)
Silicon Dioxide (SiO2)
Conglomerate (River Rock)
Clastic sedimentary rock (primarily SiO2)
Devil's Toenail
Gryphaea (extinct genus of foam oysters, typically composed of Calcite CaCO3)
Chalcedony (Common Agate)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Chert (specifically Agate/Jasper variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
Sandstone
Arenite (primarily SiO2)
Sandstone (Grooved/Weathered)
Arenite (composed primarily of Quartz and Lithic fragments)