Igneous

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)

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)

Turquoise

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

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 inclusions)

Greenstone (Greenstone River Pebble)

Greenschist (metamorphosed mafic igneous rock)

Pumice or Tufa/Travertine

Pumice (if igneous) or Calcareous Tufa (if sedimentary)

Greenstone

Greenschist (metamorphosed mafic igneous rock)

Olivine (Peridotite)

(Mg, Fe)2SiO4 (Magnesium Iron Silicate)

Granite or Granodiorite (Weathered)

Granite

Red Granite

Potassium-feldspar rich Granite

Granite

Granite

Granodiorite

Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Granodiorite

Granodiorite

Quartz

Silicon Dioxide (SiO2)

Obsidian

Obsidian (Volcanic Glass, ~70–75% SiO2)

Obsidian (Black Obsidian)

Amorphous volcanic glass (primarily SiO2)

Granite

Granite (Phaneritic Quartz-Feldspar Rock)

Basalt

Basalt (extrusive volcanic mafic rock)

Quartz with mica and feldspar (Pegmatite fragment)

Granitic Pegmatite (composed mainly of SiO2 with KAlSi3O8)

Sodalite in Matrix (often called Blue Marble or Sodalite-Syenite)

Sodalite-bearing Syenite / Na8Al6Si6O24Cl2 (Sodalite component)

Basalt

Basalt (Mafic volcanic rock)

Vesicular Basalt (Aqueous Tumbled)

Scoriaceous Basalt

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebbles

Silicon Dioxide (SiO2)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Corundum (Sapphire/Ruby in Matrix)

Corundum (Al2O3)