Sedimentary Rock (Possibly A Conglomerate Or Coarse Grained Sandstone)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Red Jasper

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

Glauconite (Glauconitic Sandstone)

Glauconite [(K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2]

Granite

Granite (a broadly defined plutonic igneous rock, often more specifically classified as quartz monzonite or granodiorite based on precise mineral percentages)

Orange Quartzite (or Aventurine Quartz)

Quartzite (primarily SiO2 with Hematite or Goethite inclusions)

Ironstone Concretion

Siderite or Hematite Concretion

Unidentified Rock Fragment

Unknown

Fossiliferous Limestone with Brachiopods

Calcium Carbonate (CaCO3) with fossilized Brachiopoda sp. (likely Order Spiriferida or Rhynchonellida)

Quartzite (tumbled or water-worn)

Quartzite (composition: SiO2)

Glauconitic Sandstone

Glauconitic Quartz Arenite

Glauconitic Sandstone

Glauconitic Quartz Arenite

Banded River Cobble with Mafic Dike

Hydrothermally altered Graywacke or Sandstone with Mafic Intrusion

Ferruginous Sandstone (Ironstone)

Sedimentary rock with high iron oxide content (Fe2O3 / FeO(OH))

Quartz

Quartz (SiO₂)

Schist with Schorl (Black Tourmaline)

NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)

Hag Stone

Porous sedimentary rock (typically Flint, Chert, or Sandstone) with naturally occurring holes

Greywacke

Lithic Sandstone (Greywacke - (SiO2+Al2O3+Fe2O3))

Quartzite (Milky)

Metamorphic rock predominantly composed of Quartz (SiO2)

Sandstone Geode (Ironstone Concretion)

Arenite with Limonite/Hematite matrix (SiO2 with Fe-oxides)

Quartz Vein in Sedimentary Rock

Silicon Dioxide (SiO2) with host Chert or Limestone

Quartzite (specifically a river-worn cobble)

Quartzite (primarily Silicon Dioxide, SiO2)

River Siltstone / Mudstone Pebble

Siltstone (composed of mixed silicate and carbonate minerals)

Red Sandstone

Arenite (primarily Quartz with Iron Oxide coating)

Ironstone Concretion (Limonite/Goethite)

Iron oxide concretion (contains FeO(OH)·nH2O)

Red Quartzite River Pebble

Quartzite (SiO2 with iron oxide inclusions)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Fossiliferous Shale

Laminated Mudrock with plant fossils

Quartzite with Iron Hydroxide Staining

Quartzite (primarily SiO2) with Limonite/Goethite staining

Limestone

Calcium Carbonate (CaCO3)

Jasper and Quartzite mix

Silicon Dioxide (SiO2) with impurities

Shale

Fissile Mudrock (Clay-rich Sedimentary Rock)

Dalmatian Jasper (or Dalmatian Stone)

Dalmatian Stone (A peralkaline felsite composed of feldspar, quartz, and sodic amphibole)

Chert with Quartz Veining

Silicon Dioxide (SiO2)

Red Quartzite / Ferruginous Quartzite

Quartzite (primarily SiO2 with Fe2O3 inclusions)

Pink Quartzite

Quartzite (primarily SiO2)

Chert (specifically tan/pink variety)

Silicon Dioxide (SiO2)

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Ironstone Concretion (Siderite Nodules)

Siderite (FeCO3) in Mudstone or Sandstone matrix

Black Sand (Magnetite Sand)

Magnetite-rich Placers (Fe3O4)

Limestone with Calcite Veining

Calcium Carbonate (CaCO3)

Gneiss

Gneiss (a rock type, not a specific mineral with a formula)