Sedimentary (Primary) With Artificial Modification

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Sandstone

Arenite

Sandstone

Clastic Sedimentary Rock (composed mostly of SiO2)

Epidote

Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)

Malachite

Malachite (Cu2(CO3)(OH)2 - a copper carbonate hydroxide mineral)

Sandstone (Quartzite-rich Cobble)

Clastic sedimentary rock (primarily SiO2)

Shale

Argillite / Shale

Sandstone

Arenite

Silty Shale

Silty Shale (Fissile Sedimentary Rock)

Shale (Ferruginous)

Laminated Mudrock (Siliciclastic Sedimentary Rock)

Shale

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

Sandstone (Water-worn pebble)

Arenite (primarily SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Shale

Shale (claystone/mudstone)

Shale (with Iron Oxide staining)

Fissile Mudstone (primarily Quartz and Clay minerals)

Moqui Marble (Concretion)

Iron Oxide Concretion (Hematite-cemented Sandstone)

Orange Calcite

Calcium Carbonate (CaCO3)

Flesh-toned Siltstone

Siltstone (composed of microscopic Quartz and Feldspar grains)

Quartz (likely milky quartz or a stained variety)

Silicon Dioxide (SiO₂)

Banded Sandstone (Zebra Stone)

Arenite with Iron Oxide Banding (Liesegang rings)

Blue Quartzite

Blue Quartzite (Primary mineral: Quartz, SiO2 with magnesio-riebeckite or crocidolite inclusions)

Sedimentary Breccia

Breccia (Clastic Sedimentary Rock)

Diamond

Diamond (a metastable allotrope of carbon, C)

Conglomerate

Sedimentary Conglomerate

Quartz, Sandstone, and Siltstone specimens

Silicon Dioxide (SiO2) and Clastic Sedimentary Rocks

Brachiopod Fossil in Limestone

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

Granite

Phaneritic Granitoid (Primary minerals: Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Mica)

Sandstone (Ferruginous)

Arenite (Fe-oxide cemented)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Iron Oxide cement)

Sandstone (Ferruginous)

Clastic Sedimentary Rock (SiO2 with Fe2O3/FeOOH cement)

Shale or Mudstone

Argillaceous sedimentary rock

Bronzite

MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)

Sandstone

Arenite

Sandstone

Arenite (primarily composed of SiO2)

Sandstone (with carbonaceous plant fragments)

Arenite (composed primarily of SiO2)

Sandstone

Arenite

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Satin Spar (Selenite)

Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)

Chert (Jasper)

Silicon Dioxide (SiO2)

Chert

Silicon dioxide (SiO2)

Breccia Pebble

Sedimentary Breccia

Sandstone Concretion

Sedimentary concretion