Yellow Jasper / Chert
Silicon Dioxide (SiO2) with Goethite or Limonite inclusions
sedimentary
Category
Sedimentary (Primary) With Artificial Modification
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
Bituminous Coal (with Anthracite or Vitrinite inclusion)
Organic-rich Sedimentary Rock (Carboniferous classification)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Grey Slate
Foliated Metamorphic Rock (formed by low-grade regional metamorphism of shale or mudstone)
metamorphic
Hematite Nodule
Hematite (Fe2O3)
mineral
Baltic Amber (Butterscotch or Egg Yolk Variety)
Succinite (C10H16O)
Organic Gemstone (fossilized resin)
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Chert (Yellow/Tan)
Microcrystalline Quartz (SiO2)
sedimentary
Smoky Quartz
SiO2 (Silicon Dioxide)
Mineral
Sandstone (likely Red/Brown Sandstone)
Arenite (SiO2 based)
sedimentary
Quartz (Microcrystalline/Chert)
Silicon Dioxide (SiO2)
mineral
Amber
Succinite (specifically for Baltic Amber), Formula: C10H16O
Organic Gemstone (often associated with Sedimentary sequences)
Quartz
Silicon Dioxide (SiO2)
mineral
Flint (Chert)
Cryptocrystalline Quartz (SiO2)
sedimentary
Gold
Native Gold (Au)
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Turquoise and Hematite
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral
Celestite
Celestine (Strontium Sulfate, SrSO4)
mineral
Conglomerate with Fossilized Shark Teeth
Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains
sedimentary
Chert (often called Flint or Jasper when pigmented)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Limonite (Iron Stone/Goethite)
Limonite (mixture of hydrated iron oxides, primarily Goethite: α-FeO(OH))
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (primarily CaCO3 as Calcite or Aragonite)
sedimentary
Chert (Brecciated Chert)
Silicon Dioxide (SiO2)
sedimentary
Limestone with Calcite Crystals
Calcium Carbonate (CaCO3)
sedimentary
Asphalt (Aggregate)
Bituminous macadam / Concrete Aggregate
sedimentary
Limestone (specifically Fossiliferous Limestone)
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (specifically Double Arch in Arches National Park)
Entrada Sandstone
sedimentary
Banded Iron Formation (BIF) / Tiger Iron
Banded Iron Formation containing Hematite (Fe2O3) and Magnetite (Fe3O4)
sedimentary
Bauxite (Laterite Clay)
Bauxite (mixture of Hydrous Aluminum Oxides: Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))
sedimentary
Bauxite
AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)
sedimentary
Calcite with iron staining
Calcium Carbonate (CaCO3)
mineral
Magnetite (Lodestone variety)
Magnetite (Fe3O4)
mineral
Turquoise
Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O)
mineral
Fossilized Pycnodonte Oyster
Pycnodonte (Gryphaeostrea) species; Composition is Calcium Carbonate (Calcite/Aragonite)
sedimentary
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate (Detrital Sedimentary Rock)
sedimentary