Sedimentary (Imitation)

Sandstone (Ferruginous)

Arenite (Fe-bearing Clastic Sedimentary Rock)

Stromatolite

Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)

Coal (Bituminous or Anthracite)

Carbonaceous sedimentary rock (primarily Carbon, C)

Sandstone (with potential fossil inclusions)

Clastic sedimentary rock (primarily SiO2)

Sandstone

Arenite

Sandstone (Weathered Pebble)

Arenite (composed primarily of SiO2)

Limonite (Iron Stone/Ocher)

Limonite (FeO(OH)·nH2O)

Sulfur (on Matrix)

Native Sulfur (S8)

Sandstone (Ferruginous)

Arenite (Fe2O3 rich)

Coarse Sandstone

Arenite (SiO2 based)

Sandstone

Arenite (primarily SiO2)

Hematite

Hematite, Iron(III) oxide (Fe2O3)

Barite Rose on Marcasite

Barium Sulfate (BaSO4) on Iron Sulfide (FeS2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Sandstone (likely Arkosic)

Clastic Sedimentary Rock (Sandstone)

Sandstone (Ferruginous)

Clastic Sedimentary Rock (Litharenite)

Shale with Vein Infillings

Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.

Puddingstone (Jasper Conglomerate)

Conglomerate (specific type: Jasper Conglomerate or Hertfordshire Puddingstone)

Conglomerate

Conglomerate (clastic sedimentary rock)

Conglomerate

Conglomerate (clastic sedimentary rock)

Geode (unopened) or Calcareous Nodule

Siliceous or Calcareous Concretion/Nodule

Sandstone

Arenite (primarily SiO2)

Sandstone (Tumbled/River Pebble)

Arenite (composed primarily of SiO2)

Amber-bearing Coal/Sedimentary Rock

Bituminous coal or carbonaceous siltstone with Fossilized Tree Resin (C10H16O)

Limonite / Ironstone Nodule

Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O

Chert (often called Flint when dark)

Sedimentary cryptocrystalline quartz (SiO2)

Sandstone

Sandstone (Sedimentary rock composed of silicate grains)

Conglomerate

Clastic sedimentary rock (Polymictic Conglomerate)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Bituminous Coal

Organic Sedimentary Rock (Carbon-based)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Sandstone

Arenite (primarily SiO2)

Gastropod Fossil (Snail Steinkern)

Class Gastropoda fossil, composed of Calcium Carbonate (CaCO3)

Sandstone concretion (Ironstone-stained)

Arenite with Limonite/Hematite staining (Silica-based with Iron Oxides)

Coal

Bituminous or Anthracite coal (carbon-rich sedimentary rock)

Sandstone (Water-worn Cobble)

Arenite (SiO2 based)

Chert / Flint

Cryptocrystalline quartz (SiO2)

Sandstone with Quartz Vein

Arenite with SiO2 intrusion

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 cementation)

Sandstone (likely Ferruginous)

Arenite (SiO2 based with Fe2O3/FeO(OH) cement)