Chert (Chalcedony)
Microcrystalline Quartz (SiO2)
Category
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
Chert (Chalcedony)
Microcrystalline Quartz (SiO2)
Chert (Iron-stained variant)
Microcrystalline Quartz (SiO2)
Chert (Chert / Flint)
Silicon Dioxide (SiO2)
Fossiliferous Limestone
Fossiliferous Calclutite / Bio-calcarenite (CaCO3)
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
Chert (often called Flint or Jasper if reddish)
Microcrystalline Quartz (SiO2)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Green Aventurine
Silicon Dioxide (Quartz) with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
Quartz Geode in Sedimentary Matrix
Silicon Dioxide (SiO2) within a limestone/dolostone host
Celestine
Celestine (Strontium Sulfate, SrSO4)
Shale
Lutaceous sedimentary rock
Honey Calcite
Calcium Carbonate (CaCO3)
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Sandstone (Ferruginous)
Arenite (complex silicate composition with iron oxides)
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Hematite
Iron(III) oxide (Fe2O3)
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Hematite (Tumbled)
Iron(III) oxide (Fe2O3)
Calcite
Calcium Carbonate (CaCO3)
Milky Quartz
Silicon Dioxide (SiO2)
Hematite
Iron(III) oxide (Fe2O3)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Limestone
Calcium Carbonate (CaCO3)
Limestone Pebble
Calcium Carbonate (CaCO3)
Iron Ore (Hematite/Goethite)
Ironstone (Fe2O3 / FeO(OH))
Ferruginous Sandstone
Clastic Sedimentary Rock (Iron-rich)
Emerald / Green Beryl
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
Yellow Calcite
Calcium Carbonate (CaCO3)
Magnetite / Hematite mix (Iron Ore)
Fe3O4 (Magnetite) / Fe2O3 (Hematite)
Travertine (often colloquially called Tufa)
Chemical Sedimentary Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Limonite (Iron Ore)
Limonite (mixed iron hydroxides, primarily FeO(OH)·nH2O)
Quartz
Silicon Dioxide (SiO2)
Banded Chert (River Stone)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Note: Image shows a biological specimen (Rat), not a rock. Representative geological equivalent: Galena (due to lead-grey colors in fur).
Galena (PbS)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Opal
Hydrated amorphous silica (SiO2·nH2O)
Chert (Flint)
Chert (Microcrystalline or cryptocrystalline Quartz, SiO2)
Red Sandstone
Arenite (Ferruginous Sandstone)