Mineral, Possibly Rock Fragment Containing A Mineral

Granatic Pegmatite

Pegmatitic Granite

Sandstone with Foliose Lichen

Arenite (Rock matrix) with Xanthoparmelia or Flavoparmelia (Lichen genus)

Sandstone

Arenite (primarily Quartz, SiO2)

Quartz (Grain/Fragment)

Silicon Dioxide (SiO2)

Moss Agate

Chalcedony (SiO2) with inclusions of manganese or iron oxides

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Basalt with Vesicular Surface

Basalt (Mafic Extrusive)

Sandstone (Micaceous)

Arenite (composed primarily of SiO2)

Quartz Geode Fragment

Silicon Dioxide (SiO2) in a Sedimentary Host

Ferruginous Sandstone

Clastic Sedimentary Rock (Iron-rich)

Pyrite (on host rock)

Iron Sulfide (FeS2)

Ironstone Concretion (Moqui Marble variety)

Ferruginous Sandstone Concretion

Sandstone

Arenite (SiO2 based with quartz grains)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Sandstone

Arenite (Siliclastic sedimentary rock)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone (Grooved/Weathered)

Arenite (composed primarily of Quartz and Lithic fragments)

Sandstone (likely Arkosic or Quartzose)

Sandstone (SiO2 with inclusions)

Sandstone (Yellow/Tan)

Clastic sedimentary rock (primarily SiO2 with iron oxide staining)

Sandstone Beach Pebble

Clastic sedimentary rock (SiO2 with iron oxide cement)

Sandstone

Arenite (Siliclastic sedimentary rock, primarily SiO2)

Red Sandstone (Iron-rich Sandstone)

Clastic Sedimentary Rock - Quartz Arenite / Arkose with Hematite Cement

Sandstone (likely Quartzose)

Arenite (primarily SiO2)

Sandstone (Quartzose type)

Arenite (primarily SiO2)

Shale

Fissile Mudrock (Clay-rich Sedimentary Rock)

Pumice

Pumice (volcanic rock)

Red Sandstone

Arenite (Ferruginous Sandstone)

Gneiss (specifically a Granitic Gneiss)

Gneiss (Composition: Quartz, Feldspar, Mica)

Banded Iron Formation (BIF) with Quartz

Banded Iron Formation, often composed of alternating layers of hematite (Fe2O3) or magnetite (Fe3O4) and chert (microcrystalline quartz, SiO2)

Basalt River Cobble

Basalt (Aphanitic Mafic Volcanic Rock)

Serpentinite

Serpentinite (composed primarily of mineral group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)

Fossilized Bone Fragment

Permineralized Skeletal Element (Likely Vertebrate)

Tourmalinated Quartz

Silicon Dioxide (SiO2) with Schorl inclusions (NaFe2+3Al6(BO3)3Si6O18(OH)4)

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Moss Agate

Chalcedony (Silicon Dioxide, SiO2) with inclusions

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

Garnet Schist

Almandine-Muscovite Schist

Chrysocolla in Matrix

Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4' nH2O on Quartz/Feldspar matrix

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide cement)