Sedimentary (Man Made Conglomerate)

Sandstone (Ferruginous)

Arenite with Iron Oxide (Fe2O3) cement

Sandstone (Micaceous)

Arenite (composed primarily of SiO2)

Sandstone (Water-worn Pebble)

Clastic Sedimentary Rock (primarily SiO2)

Shale (sub-type: Carbonaceous Shale)

Lutaceous Sedimentary Rock

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)

Shale

Fissile mudstone (Shale)

Silty Shale

Silty Shale (Fissile Sedimentary Rock)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Shale

Mudstone (composed primarily of clay minerals like kaolinite, illite, and smectite, with quartz and calcite)

Shale (with Iron Oxide staining)

Fissile Mudstone (primarily Quartz and Clay minerals)

Brachiopod Fossil in Limestone

Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)

Sandstone (likely Arkosic)

Clastic Sedimentary Rock

Pyrite in Shale

Iron Disulfide (FeS2)

Sandstone

Clastic Sedimentary Rock (composed mostly of SiO2)

Sandstone (with carbonaceous plant fragments)

Arenite (composed primarily of SiO2)

Shale

Fissile Siliciclastic Sedimentary Rock

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Chert

Silicon dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Iron Oxide cement)

Shale

Fissile Mudstone

Gastropod Steinkern (Internal Mold Fossil)

Gastropoda (Class); Internal mold or 'Steinkern' composed of Calcium Carbonate (CaCO3) or Sedimentary matrix

General Rock and Mineral Collection (Center: Angelite / Blue Anhydrite)

Anhydrite (Calcium Sulfate, CaSO4)

Banded Sandstone (Zebra Stone)

Arenite with Iron Oxide Banding (Liesegang rings)

Sandstone with Ironstone Concretion

Arenite with Hematite/Goethite nodules (Fe2O3 / FeO(OH))

Sandstone or Limestone

Sedimentary Rock

Shale

Shale (Lutite)

Shale

Fissile mudrock (composed primarily of clay minerals and quartz)

Sandstone

Arenite (Clastic Sedimentary Rock)

Sandstone or Limestone

Arenite or Calcareous Sedimentary Rock

Calligraphy Stone

Mariam Jasper (Fossiliferous Limestone composed of Hematite and Shell remains)

Shale

Fissile mudrock (composed of clay-sized particles and detrital grains)

Shale

Fissile Mudstone (primarily composed of phyllosilicate minerals like kaolinite, montmorillonite, and illite)

Shale

Clastic sedimentary rock (primarily clay and silt minerals)

Pyrite

Iron Sulfide (FeS2)

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

Sandstone (likely Graywacke or Arkosic varieties)

Arenite (composed primarily of SiO2)

Sandstone

Arenite

Mixed Tumbled Gemstones (Agate, Aventurine, Pyrite, etc.)

Multiple (principally Silicon Dioxide SiO2 and Iron Disulfide FeS2)

Sandstone

Arenite (SiO2 principal)

Flesh-toned Siltstone

Siltstone (composed of microscopic Quartz and Feldspar grains)

Shale

Shale (fine-grained clastic sedimentary rock)

Shale with Siltstone layering

Sedimentary Clastic Rock (Mudstone/Shale)