Chert (Flint)
Chert (SiO2)
Category
Browse mineral on sedimentary rock specimens identified by the Rock Identifier community.
Chert (Flint)
Chert (SiO2)
Banded Chert or Agate
Silicon Dioxide (SiO2)
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (specifically Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
Banded Chert (Agate-like Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert / Jasper / Agate (Chalcedony Group)
Microcrystalline Quartz (SiO2)
Chert (and/or River Pebble)
Microcrystalline silica (SiO2)
Unable to identify - Image contains non-geological items
Milky Quartz
Silicon Dioxide (SiO2)
Amber
Succinite (with formula approximately C10H16O)
Gneiss (specifically a Banded Gneiss cobble)
Gneiss (composed mainly of Quartz, Feldspar, and Biotite/Amphibole)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Gneiss (Metamorphic Rock)
Gneiss
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix
Magnetite (Small Granule)
Magnetite (Fe3O4)
Chert with Asphaltum (or Tar)
Silica (SiO2) with natural Bitumen/Asphaltum
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Ferruginous Chert
Microcrystalline Quartz (SiO2) with Iron Oxides
Desert Rose (Gypsum Variety)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Laterite
Laterite (Ferricrete)
Chert (Chert / Flint)
Silicon dioxide (SiO2) - Microcrystalline quartz
Chert (Nodule)
Silicon Dioxide (SiO2)
Pyrite in Shale
Iron Sulfide (FeS2) in Argillaceous Shale
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2
Limestone
Calcareous sedimentary rock (primarily Calcium Carbonate, CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Ferruginous Chert (Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
Dolomite on Prehnite (Saddle-shaped Dolomite)
Dolomite [CaMg(CO3)2] on Prehnite [Ca2Al(AlSi3O10)(OH)2]
Bituminous Coal
Organic Sedimentary Rock (Carbon-based)
Chert / Flint
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Limestone (specifically Dolomitic/Crystalline Limestone)
Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)
Ferruginous Sandstone (Ironstone)
Sedimentary rock with Limonite/Goethite cement
Jasper or Chalcedony
Microcrystalline Quartz (SiO2)
Puddingstone
Conglomerate (Indurated)
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
Chert (Flint)
Cryptocrystalline Quartz (SiO2)
Quartzite River Rock (with Limonite staining)
Quartzite (SiO2)
Limestone (with Iron-Oxide staining)
Sedimentary Calcium Carbonate (CaCO3)
Gneiss (specifically a Banded Gneiss pebble)
Gneiss (High-grade Regional Metamorphic Rock)
Grey River Pebble (Likely Quartz-rich or Limestone)
Clastic Sedimentary Rock (typically SiO2 or CaCO3 based)
Limestone with Calcite Veining
Calcium Carbonate (CaCO3)