Igneous Or Sedimentary (Anthropogenic Modification)

Pink Granite

Phaneritic Acidic Igneous Rock (primarily SiO2, Al2O3, K2O)

Granite

Phaneritic Igneous Rock (composed mostly of Quartz, Feldspar, and Mica)

Granite (Pink Orthoclase variety)

Phaneritic intrusive igneous rock (Quartz, Orthoclase, Plagioclase, and Mica)

Granite

Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Granite (Alkali-feldspar rich)

Phaneritic Felsic Igneous Rock (Major components: KAlSi3O8, SiO2)

Vesicular Basalt

Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Granite

Plutonic Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)

Granite

Phaneritic Plutonic Igneous Rock (composed of Quartz, Feldspar, and Mica)

Granitic Pegmatite

Coarse-grained Igneous Rock (Granitic composition: KAlSi3O8, SiO2)

Granite

Phaneritic intrusive igneous rock (composition: Quartz, Feldspar, Mica)

Granite

Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Granite

Phaneritic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)

Granite

Phaneritic Intrusive Igneous Rock (composed of Quartz, Feldspar, and Mica)

Granite (Specimen: Logan Rock)

Phaneritic plutonic igneous rock (mainly Quartz, Feldspar, and Mica)

Granite

Phaneritic Felsic Igneous Rock (composed of quartz, feldspar, and mica)

Basalt

Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)

Vesicular Basalt (Scoria)

Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Aquamarine and clear quartz

Aquamarine (Be3Al2Si6O18), Quartz (SiO2)

Banded Gneiss

Gneiss (pronounced "nice")

Sandstone

Arenite (composed mainly of SiO2)

Sandstone (Ferruginous)

Arenite (Fe-rich)

Sandstone (likely Quartzose Sandstone with mineral staining)

Arenite (composed mainly of SiO2)

Reddish Brown Claystone or Siltstone

Argillite / Siltstone / Claystone

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)

Granite Pebble

Granite (a phaneritic intrusive igneous rock consisting of quartz, alkali feldspar, and plagioclase)

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-feldspar, Quartz, and Biotite)

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)

Granite

Phaneritic intrusive igneous rock (composition: Quartz, Alkali Feldspar, Plagioclase Feldspar)

Pink Granite

Felsic Intrusive Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)

Granodiorite

Granodiorite (Phaneritic intrusive igneous rock containing Plagioclase, Quartz, and Biotite/Amphibole)

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Plagioclase)

Granite

Granite (Phaneritic intrusive igneous rock) - Composition: SiO2, Al2O3, K2O, Na2O

Granite

Phaneritic Igneous Rock (composed primarily of Quartz SiO2, Alkali Feldspar, and Plagioclase)

Sandstone (Micaceous)

Arenite (primarily SiO2 with Phyllosilicates)

Sandstone (Ferruginous)

Arenite with Iron Oxide cement

Sandstone (Red)

Arenite (Fe2O3 heavy)

Sandstone

Arenite (SiO2 based)

Sandstone (Painted)

Arenite (primarily SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone Concretion

Clastic sedimentary rock (primarily Silica, SiO2, or Calcium Carbonate, CaCO3)

Chert (often called Flint)

Chert (Cryptocrystalline Quartz, SiO2)

Sandstone (likely Arkose or Quartz Sandstone)

Arenite (SiO2 + varied clasts)