Bituminous Coal (with Anthracite or Vitrinite inclusion)
Organic-rich Sedimentary Rock (Carboniferous classification)
Category
Browse anthropogenic sedimentary (man made) specimens identified by the Rock Identifier community.
Bituminous Coal (with Anthracite or Vitrinite inclusion)
Organic-rich Sedimentary Rock (Carboniferous classification)
Jasper Marble
Silicon Dioxide (SiO2) with Impurities
Flint
Silicon Dioxide (SiO2) - Microcrystalline Quartz / Chert
Chert (varietal Flint)
Microcrystalline quartz (SiO2)
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
Chert (Jasper type)
Microcrystalline Quartz (SiO2)
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Fossilized Shark Tooth (Sand Tiger)
Carcharias sp. (Fossilized Tooth)
Coquina / Fossiliferous Limestone
Fossiliferous Limestone (Calcite, CaCO3)
Chert Nodule
Microcrystalline Quartz (SiO2)
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
Chert
Chert (Microcrystalline Quartz, SiO2)
Chert (Common Variety, Jasper)
Microcrystalline Quartz (SiO2)
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Chert (Nodule)
Chert (Alpha-Quartz, SiO2)
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert / Flint
Silicon Dioxide (SiO₂)
Diamond
Native Carbon (C)
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
Flint
Sedimentary cryptocrystalline quartz (SiO2)
Hag Stone (Flint with natural hole)
Silicon Dioxide (SiO2) - Nodular Chert / Flint
Banded Calcite or Travertine
Calcium Carbonate (CaCO3)
Coquina
Coquina (Bioclastic Limestone)
Pyrite
Iron Sulfide (FeS2)
Pyrite
Iron Disulfide (FeS2)
Chert (Chocolate or Brown Flint)
Chert (SiO2)
Chert (Flint)
Chert (Cryptocrystalline Silica, SiO2)
Sandstone
Arenite (SiO2 primarily)
Banded Chert / Chalcedony
Silicon Dioxide (SiO2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Quartz (likely Chalcedony or Chert)
Silicon Dioxide (SiO2)
Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Pyrite
Iron Disulfide (FeS2)
Corundum (Ruby variety)
Aluminium oxide (Al2O3)
Diamond (as set in a gold ring)
Carbon (C)
Chalk
Calcium Carbonate (CaCO3)
Chert
Microcrystalline Quartz (SiO2)